mNeonGreen tag inserted into C-terminus of endogenous sdhb-1 locus. Animals are slow growing with reduced brood size. Insertion verified by PCR. Left flanking sequence: 5' AACTGATGATGTAGCCGCCAAG 3' ; Right flanking sequence: 5' CAGTGAAAGTGCGTGTAGGA 3'. sgRNA: 5' ATCTCTCCGATGGCCTTAGC 3'.