RNAi for T27B1.2 produces a Pat phenotype. A) Nine candidate genes located near the mapped pat-9 locus on the X chromosome show muscle expression patterns according to SAGE data. B) Wild type N2 animals at the 2.5-fold stage C) pat-9 mutant animals segregated from strain RW1385. D) Only T27b1.2 RNAi caused a Pat phenotype at the embryonic stage. Bars = 10 μm.