(full paper is archived in the Miller Library)
Title: Investigations of the adhesive properties of Phragmatopoma californica eggs
Student Author(s): Chiu, Annie
Faculty Advisor(s): Epel, David
Location: Final Papers Biology 175H
Date: June 1993
Abstract: Phragmatopoma californica is a marine annelid that sheds sticky eggs. The adhesion of the eggs was found to be dependent on trace levels of calcium. Transglutaminase inhibitors dansylcadaverine and putrescine prevented or lowered stickiness, indicating the involvement of transglutaminase cross-linking in the adhesion process. Other substrates that prevented stickiness were protease and ethylenediamine. The egg surface adhered to a polylysine coat, indicating a negatively-charged membrane. Adhesion does not appear to follow the model system of Mytilus edulis, so P. californica may present a new system of adhesion in water.