Background mutation in strain RB2126 affects the locomotion behavior of mutants.

The FLP-1 neuropeptide is involved in locomotion, mechanosensation, and reproduction. Strain RB2126 is reported to contain the mutation, a prospective null allele. Here we report that strain RB2126, in addition to , also contains two additional background mutations. One of the mutations gives the animals a constitutive dauer phenotype (Daf-c), and complementation testing confirms that it is in the Daf-c gene The second mutation is isolated based on the fact that it partially suppresses the elevated body curvature of mutants, but it remains uncloned. The updated genotype of RB2126 strain is