FIG. 2.

Phenotypes of PTX expression. Adult nematodes were heat shocked, transferred to NGM agar seeded with E. coli, and photographed. (A) w.t., wild-type strain N2. (B) ptx⁺, strain XA1433, carrying a heat shock inducible ptx gene. (C) Δgoa-1, strain CB363, a goa-1 deletion mutant. Color transparencies were digitally scanned, converted to grayscale, and adjusted slightly for brightness and contrast with Adobe Photoshop.