... charac-terized by use of a larval stage, the body patterning of whichis essentially different from the body patterning of the adult[57]. The comparative study of gene expression patterns inthe larvae of ... fac-tor-β signaling pathways, or the zinc-treated embryos mayundergo a recovery process that leads to elevated expression of early patterning genes. Because many of the differentiallyexpressed genes ... Berlin, Germany. †University of Victoria, Departments of Biology and Biochemistry/Microbiology, 3800 Finnerty Road, Victoria, British Columbia, Canada V8P 5C5. ‡US National Institutes of Health,...