Epel, D Methods for removal of the vitelline membrane of sea urchin eggs. II. Controlled exposure to trypsin to eliminate post-fertilization clumping of embryos. [electronic resource] - Experimental cell research Jul 1970 - 69-70 p. digital Publication Type: Journal Article ISSN: 0014-4827 Standard No.: 10.1016/0014-4827(70)90258-2 doi Subjects--Topical Terms: AgglutinationAnimalsEchinodermata--drug effectsFemaleOvum--drug effectsTrypsin--pharmacologyVitelline Membrane--drug effects