Visible embryonic marker

[MJOINER at BINAH.CC.BRANDEIS.EDU]

Hello readers,
		I want to select my mutant embryos that are a late embryonic
lethal (18/20 hours).  The mutant elav is too close to yellow and hence I am
not able to use that. I was wondering if there are any embryonic visible mar-
ker that will allow me to pick up my mutants without needing to fix them for
immunohistochemistry. I need to collect these embryos for doing westerns.
	I was thinking in lines of a cuticular marker, but the one I need sho-
uld not affect the development of the nervous system. 
	If you have any ideas/thoughts please send a reply either to this
address or to Koushika at binah.cc.brandeis.edu
Thankyou,
Sandhya Koushika