B, C, Expression pattern of Pser-1::gfp in L1 hermaphrodite larvae. Pser-1::gfp(egEx21) contains an 8 kB upstream
ser-1 promoter and is expressed in pharyngeal muscle, neurons in the head, ventral cord, and tail of L1 larvae. D, Expression of Pser-1::gfp(egEx21) in young adults. Pser-1::gfp is expressed in the vulval muscles in young adult hermaphrodites.