13-P143 FoxD3 regulation of zebrafish mesoderm induction: Suppression of a potential null mutation by translational frameshifting

diapause. Pafr protein was present in a membrane bound form in the glandular epithelium of the endometrium across all stages, analysis studies are in progress to determine any temporal changes in levels of expression. In vitro, paf production from the endometrium increases after diapause (Kojima et al., 1993). p53 expression assessed by RT-PCR, was detected in the endometrium across all stages of entry into, diapause and reactivation from diapause. p53 protein levels in the endometrium varied dependent on stage examined. These data suggest that paf and p53 may participate in the molecular control of embryonic diapause in the tammar.