UAS regulatory sequences drive expression of srp.
cardiogenic mesoderm, with Scer\GAL4Mef2.PR
embryonic pericardial cell, with Scer\GAL4Mef2.PR
Ectopic expression of srpScer\UAS.cPa, driven by Scer\GAL4Mef2.PR, in the whole cardiogenic mesoderm induces pericardial cells to adopt lymph-gland fate in stage 16 embryos.