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

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