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Strain Species Genotype
ABR212 C. elegans acd-1(sta6) delm-2(ok1822) I. Show Description
acd-1 and delm-2 are tandem paralogs. This double mutant was created by CRISPR-engineered deletion of acd-1 in a delm-2(ok1822) background (parental strain RB1523). acd-1(sta6) is predicted to be a null allele (~200bp indel causing frameshift in exon 4).
ABR225 C. elegans acd-1(sta6) delm-2(ok1822) I; delm-1(ok1266) IV. Show Description
acd-1 and delm-2 are tandem paralogs. This double mutant was created by CRISPR-engineered deletion of acd-1 in a delm-2(ok1822) background (parental strain RB1523). acd-1(sta6) is predicted to be a null allele (~200bp indel causing frameshift in exon 4). This triple mutant strain was made by crossing the acd-1(sta6) delm-2(ok1822) double mutant with delm-1(ok1226) parental strain RB1177.
CA998 C. elegans ieDf2 [unc-119+]/mIs11 IV. Show Description
mIs11 [myo-2p::GFP + pes-10p::GFP + F22B7.9::GFP]. Heterozygotes are wild-type with dim GFP signal in the pharynx. mIs11 homozygotes are wild-type with bright GFP in the pharynx. ieDf2 homozygotes (non-GFP) develop normally but produce 97.5% inviable embryos and a high frequency of males among the surviving self-progeny. Pick WT with dim GFP+ in pharynx to maintain. mIs11 homozygotes will quickly overtake the population if not selected against. GFP expression in 4-cell embryos, pharyngeal muscle and gut. ieDf2 is a deficiency of zim-1, zim-2, zim-3, and him-8 generated by MosDel, resulting in single-copy insertion of a copy of the C. briggsae unc-119 gene on Chromosome IV. The deletion spans the sequences from the beginning of the zim-1 coding sequence through the ttTi22866 Mos1 insertion site.
CER348 C. elegans trxr-1(cer35[Sec666C]) IV. Show Description
Missense mutation selenocysteine to cysteine. Resistant to cisplatin exposure. Primers to genotype this missense mutation and other silent mutations: [Common Fw: GGCTTCCACATTCTCACTCC] [RV wildtype: CTTAACCTCAGCAACCAGAA] [RV Sec to Cys: CTTAACCGCAACATCCGCTG] Reference: García-Rodríguez FJ, et al. Dis Model Mech. 2018 Jun 21;11(6).
CER374 C. elegans trxr-1(cer55[Sec666X]) IV. Show Description
Missense mutation engineered by CRISPR removes a selenocysteine to place a stop codon. Resistance to cisplatin exposure. Primers to genotype the cer55 and other silent mutations: [Common Fw: #1224 GGCTTCCACATTCTCACTCC] [RV wildtype: #1414 cTTAACCTCAGCAACCAGAA] [RV Sec to STOP: #1421 CTTAACCTTAACATCCGCTG] Reference: García-Rodríguez FJ, et al. Dis Model Mech. 2018 Jun 21;11(6).
Db11 Serratia marcescens Serratia marcescens. Show Description
Bacteria. Former CGC designation IGX2. Tetracyclin, streptomycin and kanamycin resistant. A spontaneous mutant resistant to streptomycin isolated from Db10. Serratia marcescens is a Gram-negative bacterium with a broad host range. S. marcescens is an opportunistic human pathogen and kills C. elegans upon colonization of the nematode intestine. Strain Db11 is a non-pigmented strain that is used to infect the nematode Caenorhabditis elegans in an infection-based model for studying host-pathogen interactions. See Flyg, Kenne K, Boman HG: Insect pathogenic properties of Serratia marcescens: phage-resistant mutants with a decreased resistance to Cecropia immunity and a decreased virulence to Drosophila. CGC #5819. References: Kurz CL, et al. EMBO J. 2003 Apr 1;22(7):1451-60. Iguchi A, et al. Genome Biol Evol. 2014 Aug;6(8):2096-110. J. Gen. Microbiol. 1980; 120: 173-181. Biosafety Level: BSL-1.
DCL569 C. elegans mkcSi13 II; rde-1(mkc36) V. Show Description
mkcSi13 [sun-1p::rde-1::sun-1 3'UTR + unc-119(+)] II. Germline rescue of the rde-1(mkc36) indel mutation, allowing germline-specific RNAi. Reference: Zou L, et al. Scientific Reports Volume 9, Article number: 2354 (2019) "Construction of a germline-specific RNAi tool in C. elegans."
EG4348 C. elegans Show Description
Utah natural isolate carrying peel-1(qq99) I. EG4348 was collected by M. Ailion from Salt Lake City, UT. qq99 designates the naturally occurring nonsense mutation in peel-1. Reference: Seidel HS et al. PLoS Biol. 2011 Jul;9(7):e1001115.
EG5389 C. elegans oxIs494 II; unc-119(ed3) III. Show Description
oxIs494 [peel-1p::GFP::peel-1 3'UTR + Cbr-unc-119(+)] II. GFP is expressed in the spermatogenic germline. During spermatogenesis, GFP remains in the residual body and is not packaged into sperm. Reference: Seidel HS, et al. PLoS Biol. 2011 Jul;9(7):e1001115.
EG5767 C. elegans qqIr7 I; oxSi78 II; unc-119(ed3) III. Show Description
qqIr7 [peel-1(qq99)] I. oxSi78 [peel-1p::peel-1 (introns included)::GFP::peel-1 3'UTR + Cbr-unc-119(+)] II. Genetic background is a mixture of N2 and wild isolate EG4348. The oxSi78 insertion produces a PEEL-1::GFP translational fusion. PEEL-1::GFP is expressed in the spermatogenic germline and packaged into sperm. PEEL-1::GFP appears to localize to fibrous body-membranous organelles. PEEL-1::GFP does not rescue peel-1(qq99). Reference: Seidel HS, et al. PLoS Biol. 2011 Jul;9(7):e1001115.
EG5801 C. elegans oxSi87 II; unc-119(ed3) III. Show Description
oxSi87 [peel-1p::N-terminal 12 amino acids of PEEL-1::GFP::peel-1 3'UTR + Cbr-unc-119(+)] II. GFP is expressed in the spermatogenic germline. During spermatogenesis, GFP is packaged into sperm. Reference: Seidel HS, et al. PLoS Biol. 2011 Jul;9(7):e1001115.
EGD329 C.elegans egxSi126 I; unc-119(ed3) III Show Description
egxSi126 [mex-5p::hsp-3(aa1-19)::halotag::HDEL::pie-1 3’UTR + unc-119(+)] I. Superficially wild-type. Stable expression of Halotag in the ER lumen in the germline and embryos. Reference: Fan X, et al. G3 (accepted).
EGD565 C.elegans egxSi145 II; unc-119(ed3) III. Show Description
egxSi145 [mex-5p::hsp-3(aa1-19)::halotag::HDEL::pie-1 3’UTR + unc-119(+)] II. Superficially wild-type. Stable expression of Halotag in the ER lumen in the germline and embryos. Reference: Fan X, et al. G3 (accepted).
GR1428 C. elegans mgIs45 I. Show Description
mgIs45 [mir-84(+) + tub-1::GFP] I. mir-84 over-expressing line. Reference: Hayes GD, Riedel CG, Ruvkun G. Genes Dev. 2011 Oct 1;25(19):2079-92.
GR1452 C. elegans veIs13 V; let-7(mn112) unc-3(e151) X; mgEx725. Show Description
veIs13 [col-19::GFP + rol-6(su1006)] V. mgEx725 [lin-4::let-7 + ttx-3::RFP]. Pick RFP+ to maintain. mgEx725 rescues lethality of let-7(mn112). Precocious expression of col-19::GFP at the L4 stage. Reference: Hayes GD, Riedel CG, Ruvkun G. 2011. Genes Dev. 2011 Oct 1;25(19):2079-92.
GR1583 C. elegans somi-1(mg415) V. Show Description
Adults slightly Dpy. Suppresses defects caused by over-expression of mir-84. Enhances retarded heterchronic phenotypes caused by a weak allele of let-7 or loss of mir-84. Reference: Hayes GD, Riedel CG, Ruvkun G. 2011. Genes Dev. 2011 Oct 1;25(19):2079-92.
GR1586 C. elegans somi-1(tm562) V. Show Description
Adults slightly Dpy. Suppresses defects caused by over-expression of mir-84. Enhances retarded heterchronic phenotypes caused by a weak allele of let-7 or loss of mir-84. Reference: Hayes GD, Riedel CG, Ruvkun G. 2011. Genes Dev. 2011 Oct 1;25(19):2079-92.
GR1589 C. elegans mgIs45 I; somi-1(mg431) wIs54 V. Show Description
mgIs45 [mir-84(over-expressing) + tub-1::GFP] I. wIs54 [scm::GFP] V. Maintain by picking animals with good expression of tub-1::GFP in amphid neurons to maintain. somi-1 mutation suppresses precocious development of the vulva and hypodermal cells caused by over-expression of mir-84. Reference: Hayes GD, Riedel CG, Ruvkun G. 2011. Genes Dev. 2011 Oct 1;25(19):2079-92.
GR1895 C. elegans daf-2(e1370) III; mgIs67. Show Description
mgIs67 [daf-16p::daf-16::GFP + rol-6(su1006)]. Temperature-sensitive. Daf-c. Maintain at 15C. Dauer formation at 25C. Slow growing. Dauer-like at 20C. DAF-16::GFP is fully nuclear at 20C. Reference: Riedel CG, et al. Nat Cell Biol. 2013 May;15(5):491-501.
HA1706 C. elegans pha-1(e2123) III; rtEx726. Show Description
rtEx726 [del-1p::YC2.60 + pha-1(+)] expresses yellow cameleon YC2.60 in a subset of motor neurons. Maintain at 25C to select for the presence of the array. Haspel G, et al. (2010) J. Neurosci. 30:11151-6.
HA2464 C.elegans sod-1(tm776) II; rtSi8 IV; him-5 V; vsIs48. Show Description
rtSi8 [sod-1p::sod-1(A4V) + Cbr-unc-119(+)] (inserted into cxTi10882) IV. vsIs48 [unc-17::GFP]. A4V mutation in C. elegans sod-1 genomic rescue construct mimics human SOD1 disease model. Superficially wild-type with increased sensitivity to paraquat in multiple assays. GFP expressed in all cholinergic neurons. Strain reportedly carries a him-5 mutation in the background, though specific allele has not been confirmed. HA2619 serves as a control strain for HA2464. Reference: Baskoylu SN, et al. PLoS Genet. 2018;14(10):e1007682.
HA2846 C.elegans fust-1(rt256[R446S]) II. Show Description
fust-1(rt256[R446S]) was created by CRISPR editing of arginine codon in C. elegans fust-1 to create FUS disease model for human mutation R524S. This strain also contains additional silent edits (also present in control strain HA2845), and was back-crossed to remove the pha-1 allele used in strain construction. Under normal culture conditions HA2846 animals are superficially wild-type; after stress latent defects are observed. Reference: Baskoylu S, et al. bioRxiv 799932; doi: https://doi.org/10.1101/799932
HA2847 C.elegans fust-1(rt257[P447L]) II. Show Description
fust-1(rt257[P447L]) was created by CRISPR editing of proline codon in C. elegans fust-1 to create FUS disease model for human mutation P525L. This strain also contains additional silent edits (also present in control strain HA2845), and was back-crossed to remove the pha-1 allele used in strain construction. Under normal culture conditions HA2847 animals are superficially wild-type; after stress latent defects are observed. Reference: Baskoylu S, et al. bioRxiv 799932; doi: https://doi.org/10.1101/799932
HA2987 C. elegans sod-1(rt449[G85RC]) II. Show Description
sod-1(rt449[G85RC]) was created by CRISPR editing of the cognate glycine codon in C. elegans sod-1 to create a disease model for human mutation G93A. This strain also contains additional silent edits, and was back-crossed to remove the pha-1 allele used in strain construction. Under normal culture conditions HA2987 animals are superficially wild-type; after stress latent defects are observed. Reference: Baskoylu S, et al. bioRxiv 799932; doi: https://doi.org/10.1101/799932
HA3299 C. elegans sod-1(rt451[sod-1G85R]) II. Show Description
Superficially wild-type with increased sensitivity to paraquat in multiple assays. Can be maintained 15-25C. rt451 is CRISPR/Cas9 engineered G85R missense mutation in endogenous sod-1 locus mimicking human ALS SOD1 model. Reference: Baskoylu SN, et al. PLoS Genet. 2018;14(10):e1007682.
IMN26 C. elegans dapk-1(gk219) I; glt-3(bz34) IV; nuIs5 V. Show Description
nuIs5 [glr-1::GFP + glr-1::G(alpha)s(Q227L) V + lin-15(+)] V. dapk-1(gk219) decreases neurodegeneration. Reference: Del Rosario J, et al. BMC Neurosci. 2015 Apr 23;16:25.
IMN27 C. elegans dapk-1(gk219) I; glt-3(bz34) IV. Show Description
Reference: Del Rosario J, et al. BMC Neurosci. 2015 Apr 23;16:25.
IMN28 C. elegans dapk-1(gk219) I; nuIs5 V. Show Description
nuIs5 [glr-1::GFP + glr-1::G(alpha)s(Q227L) V + lin-15(+)] V. Reference: Del Rosario J, et al. BMC Neurosci. 2015 Apr 23;16:25.
IMN30 C. elegans pinn-1(tm2235) II; glt-3(bz34) IV; nuIs5 V. Show Description
nuIs5 [glr-1::GFP + glr-1::G(alpha)s(Q227L) V + lin-15(+)] V. pinn-1(tm2235) increases neurodegeneration. Reference: Del Rosario J, et al. BMC Neurosci. 2015 Apr 23;16:25.
JH3479 C. elegans meg-3(ax3056[del(1-544)::OLLAS]) meg-4(ax3052) X. Show Description
Embryonic P granules not localized, 30% maternal effect sterility on average, insensitivity to RNAi. meg-3(ax3056) is an-frame deletion in the endogenous meg-3 locus removing the first 544 amino acids (1-544); MEG-3 forms a cytoplasmic gradient but does not form granules in the early embryos or recruit other P granule components such as PGL-1/3. References: Smith, J. et al. Elife. 2016 Dec 3;5:e21337. doi: 10.7554/eLife.21337. PMID: 27914198 Schmidt H, bioRxiv 2020.10.15.340570 (2020) doi:10.1101/2020.10.15.340570.
JH3553 C. elegans meg-3(ax4503[del(545-862)::OLLAS]) meg-4(ax4504) X. Show Description
20% maternal effect sterility on average, RNAi insensitivity, MEG-3 does not form cytoplasmic gradient. meg-3(ax4503) is an-frame deletion in the endogenous meg-3 locus removing amino acids 545-862; MEG-3 does not form a cytoplasmic gradient but does still form granules in the early embryos and co-localizes with PGL-3 . References: Smith, J. et al. Elife. 2016 Dec 3;5:e21337. doi: 10.7554/eLife.21337. PMID: 27914198 Schmidt H, bioRxiv 2020.10.15.340570 (2020) doi:10.1101/2020.10.15.340570.
JK6403 C. elegans mpk-1(q1147[V5::mpk-1B] q1201[mpk-1B del] q1183[mpk-1AB::2xOLLAS])/qC1 [qIs56] III. Show Description
qIs56 [lag-2p::GFP + unc-119(+)]. q1201 is a 125 bp deletion causing a frameshift in mpk-1B without affected mpk-1A. Heterozygous animals Roll and have GFP+ distal tip cells. Segregates roller GFP(+) heterozygotes and non-roller GFP(-) mpk-1 homozygotes (sterile, but form a vulva). qC1 [dpy-19(e1259) glp-1(q339) qIs26] homozygotes are not viable. Endogenous mpk-1 locus tagged with a single V5 tag inserted into the mpk-1b-specific exon to specifically label the N-terminus of the MPK-1B protein, and two tandem OLLAS tags inserted into the C-terminus, labeling both MPK-1A and MPK-1B isoforms. Reference: Robinson-Thiewes et al. Cell Reports, In Press.
JRB1 Halicephalobus mephisto Halicephalobus mephisto wild isolate. Show Description
Halicephalobus mephisto wild isolate. Has approximately 1.15% snp heterozygosity. Parthenogenetic reproduction so it cannot be out-crossed. Can survive higher temperatures than C. elegans. Useful model organism for studying heat tolerance; has expanded Hsp70 and AIG1 gene families. References: Borgonie G, et al. Nature. 2011 Jun 2;474(7349):79-82. Weinstein DJ, et al. Nat Commun. 2019 Nov 21;10(1):5268.
JVR406 C.elegans jerEx30. Show Description
jerEx30 [ddr-2p::BiFC1 (EGFH1-LINK-SYN) + tph-1p::BIFC2 (SYN-EGFH2) + rol-6(su1006)]. Pick Rollers to maintain. a-Synuclein BiFC transfer strain is a model to investigate neuron-to-neuron ?-syn transfer. Reference: Tyson T, et al. Sci Rep. 2017 Aug 8;7(1):7506.
KRA439 C. elegans unc-3(n3435) X; kasEx149. Show Description
kasEx149 [oig-1p(2.6kb_del)::GFP::unc-54 3'UTR + myo-2p::GFP]. Pick worms with GFP+ pharynx to maintain array. Unc. 2.6kb cis-regulatory region with 200bp deletion removing predicted LIN-39 binding site upstream of oig-1 was fused to GFP. Expression of oig-1::GFP in GABAergic motor neurons is been abolished; expression was observed specifically in cholinergic motor neurons of the ventral nerve cord. Reference: Feng W, et al. Elife. 2020 Jan 3;9. pii: e50065. doi: 10.7554/eLife.50065.
KRA441 C. elegans unc-3(n3435) X; kasEx151. Show Description
kasEx151 [oig-1p(2.6kb_del)::GFP::unc-54 3'UTR + myo-2p::GFP]. Pick worms with GFP+ pharynx to maintain array. Unc. 2.6kb cis-regulatory region with 300bp deletion removing predicted LIN-39 binding site upstream of oig-1 was fused to GFP. Expression of oig-1::GFP in GABAergic motor neurons is retained, but eliminates ectopic expression in cholinergic motor neurons of the ventral nerve cord. Reference: Feng W, et al. Elife. 2020 Jan 3;9. pii: e50065. doi: 10.7554/eLife.50065.
MAD63 C. elegans dqSi1 II; unc-119(ed3) III. Show Description
dqSi1 [mex-5p::atx-2a(cDNA)::GFP::tbb-2 3’UTR + unc-119(+)] II. Made by injection into strain EG6699; insertion confirmed by sequencing. dqSi1 rescues atx-2(ne4297). Reference: Gnazzo MM, et al. Mol Biol Cell. 2016 Oct 15;27(20):3052-3064. (PMID: 27559134) Del Castillo U, et al. Traffic. 2019 Jun;20(6):436-447. (PMID: 30989774)
NC138 C. elegans dpy-20(e1282) IV; wdIs3 X. Show Description
wdIs3[del-1::GFP + dpy-20(+)]. del-1 is expressed in the VB motor neurons beginning the the L2 larval stage. By the end of L2, del-1::GFP is also visible in a few VA motor neurons at the anterior end of the nerve cord. Expression of del-1::GFP in the VAs progresses in a wave from anterior to posterior, with all VAs expressing del-1::GFP by the adult stage. Thus, del-1::GFP is not expressed in the VAs during the L2 period in which unc-4 functions in those cells to establish synaptic inputs but is expressed in the VAs after they have been wired into the ventral cord circuit. del-1::GFP is also expressed in five neurons (VB1, VB2, SABVR, SABVL, VA1) in the retrovesicular ganglion at the anterior end of the ventral nerve cord. During the mid-L2 larval stage, del-1::GFP expression in the ventral nerve cord is largely restricted to the VB class of motor neurons.
NC190 C. elegans wdIs6 II; dpy-20(e1282) IV. Show Description
wdIs6 [del-1::GFP + dpy-20(+)]. Embryonic GFP expression in SABVR, SABVL, VBs in mid-L2, VAs in mid-L3.
NC279 C. elegans del-1(ok150) X. Show Description
2 kb deletion mutant made by OMRF Knockout Group. Presumptive null. No obvious phenotype. Primers used: EL1: GAAACGGTGAGTGCCAATTT. ER1: AGTGCTGTCACACCAAGCAC. IL1: AAACCAACTGACCCAAGGTG. IR1: TATCTAGGGTCCGCACAACC. Left breakpoint sequence: AGGTTGACAAATTGTTGCGA. Right breakpoint sequence: CGCTTATTAAAAAATAATAT.
OG472 C. elegans drSi2 II; unc-119(ed3) III. Show Description
drSi2 [vha-6p::3XFLAG::pgp-3/CFTR(wt)::mCherry::unc-54 3'UTR] II. Superficially wild-type with mCherry expression only in the intestine with enrichment at the apical membrane. Single copy integration of the vha-6 promoter driving the PGP-3 protein with an N-terminal 3XFLAG tag and a C-terminal mCherry tag. Amino acids 476-484 of PGP-3 have been replaced with amino acids 501-509 of human CFTR (TIKENIIFG). Transgene was inserted at the ttTi5605 locus on LGII and verified to be a single copy insertion by long range PCR across the genomic locus. Reference: He L, et al. Dis Model Mech. 2012 Nov;5(6):930-9.
OG474 C. elegans drSi4 II; unc-119(ed3) III. Show Description
drSi4 [vha-6p::3XFLAG::pgp-3/CFTR(delta F508)::mCherry::unc-54 3'UTR] II. Superficially wild-type with mCherry expression only in the intestine with significantly diminished expression as compared to drSi2. Single copy integration of the vha-6 promoter driving the PGP-3 protein with an N-terminal 3XFLAG tag and a C-terminal mCherry tag. Amino acids 476-484 of PGP-3 have been replaced with amino acids 501-509 of human CFTR with F508 deleted (TIKENII_G). Transgene was inserted at the ttTi5605 locus on LGII and verified to be a single copy insertion by long range PCR across the genomic locus. Reference: He L, et al. Dis Model Mech. 2012 Nov;5(6):930-9.
OH10051 C. elegans unc-119(ed3) III; sox-2(ot640[unc-119(+)])/+ X. Show Description
ot640 was generated by using MosDel removing the entire sox-2 locus and insert unc-119(+). Heterozygotes are WT and segregate WT heterozygotes, Uncs and ot640 homozygous that arrest in L1 with a pharynx unattached (Pun) phenotype. Maintain by picking WT and check for correct segregation of progeny to maintain. Reference: Vidal B, et al. Development. 2015 Jul 15;142(14):2464-77.
OH10053 C. elegans unc-119(ed3) III; sox-2(ot640[unc-119(+)]) X; otEx4454. Show Description
otEx4454 [sox-2(fosmid)::mCherry + elt-2p::DsRed]. ot640 was generated by using MosDel removing the entire sox-2 locus and insert unc-119(+). ot640 homozygous arrest in L1 with a pharynx unattached (Pun) phenotype. Maintain by picking WT to maintain (transgene should be required for viability). Reference: Vidal B, et al. Development. 2015 Jul 15;142(14):2464-77.
OH10712 C. elegans pha-1(e2123) III; otEx4794. Show Description
otEx4794 [del-1p(2.6kb promoter)::DsRed2 + pha-1(+)]. Maintain at 25C. Reference: Kratsios P, et al. Nat Neurosci. 2011 Nov 27. doi: 10.1038/nn.2989.
OH10754 C. elegans pha-1(e2123) III; otEx4818. Show Description
otEx4818 [del-1p(2.6kb promoter)::DsRed2 + pha-1(+)]. Maintain at 25C. Reference: Kratsios P, et al. Nat Neurosci. 2011 Nov 27. doi: 10.1038/nn.2989.
OH3313 C. elegans oyIs14 V; otIs37 X. Show Description
oyIs14 [sra-6::GFP + lin-15(+)]. otIs37 [unc-47(del)::GFP]. GFP fluorescence in PVT and DBV.
OH3314 C. elegans oyIs14 V; otIs38 X. Show Description
oyIs14 [sra-6::GFP + lin-15(+)]. otIs38 [unc-47(del)::GFP]. otIs38 is integrated juEx60 [(pCZ114) unc-47(del)::GFP]. GFP fluorescence in PVT and DBV.
OP50-GFP Escherichia coli E. coli. Show Description
Bacteria. A strain of OP50 that contains a GFP plasmid (pFPV25.1) that is very fluorescent. Resistant to ampicillin. Originally published in Caenorhabditis elegans is a model host for Salmonella typhimurium. Labrousse A, Chauvet S, Couillault C, Kurz C, Ewbank J. Curr Biol. 2000 Nov 30;10(23):1543-5.
QX1409 C. elegans qqIR7 (I: peel-1(qq99), EG4348>N2); ttTi5605 II; unc-119(ed3) III. Show Description
Nonsense allele of peel-1 carried in Utah isolate EG4348 crossed into N2 Bristol background. Reference: Seidel HS et al. PLoS Biol. 2011 Jul;9(7):e1001115.