R. Burian Va Tech Hydra Did Boris never publish on that? He must have talked about it, perhaps at Cold Spring Harbor. I was surprised to find 645 citations to Hydra in Medline 1966-1997. Mostly starting in 1970's I try to remember who popularized it in 1950's. Yours, Josh. G 23 P-137 P-78 cI-author Ephrussi 12/2/97