A spurious fln-2 mutation in a wide variety of commonly used C. elegans strains.

We describe a fln-2 mutant allele present in many commonly used Caenorhabditis elegans strains. It is present in the dpy-5 ( e907 ) strain, ancestral to thousands of transgenic strains generated by the C. elegans Expression Project. This finding broadens the number of strains affected by the fln-2 mutation, now impacting thousands of transgenic lines used in diverse studies. This expands on the previous identification of the fln-2 mutation in a wild-type male stock strain used for outcrossing in genetic studies.