Heterozygotes are WT and segregate WT, Dpys and dead eggs. Dpys give only embryonic lethals which lack endoderm and make excess mesoderm. or57 is a recessive maternal-effect lethal.

Temperature-sensitive embryonic-lethal mutant. Maintain at 15C. Embryonic lethal at restrictive temperature of 26C; viable embryos at permissive temperature of 15C. [NOTE: PCR detection of or574 can be difficult. gpr-1 and gpr-2 paralogues are closely linked and 97% identical in DNA sequence.] Reference: Couwenbergs C, et al. J Cell Biol. 2007 Oct 8;179(1):15-22.

Maintain at 15C. Temperature-sensitive embryonic lethal with cytokinesis defects. Reference: Canman JC, et al. Science. 2008 Dec 5;322(5907):1543-6.

Recessive, temperature-sensitive embryonic lethal mutant . Maintain at 15C, most embryos will hatch. Nearly all embryos fail to hatch at 25C. Centrosomes are detached from nuclear spindle envelope in one-cell stage embryos; sometimes reattach to pronuclei; sometimes stay unattached throughout prophase until nuclear envelope breakdown. Mis-sense mutation in Q367P. Hook family member. Localizes to nuclear envelope and centrosomes; interacts with SUN domain proteins at nuclear envelope and interacts with dynein.