title: Ferritin as an exogenous yolk protein in snails.
abstract: A main yolk component in the oocytes of the pulmonate snailPlanorbarius corneus L. has been isolated and identified as the iron storage protein ferritin by its ultrastructure, iron content, immuunological properties and behaviour in disc electrophoresis. As judged from acrylamide electrophoresis data and ultrastructural observations, yolk ferritin is an exogenous protein which is synthesised in the hepatopancreas and taken up by the oocytes by endocytosis.
authors.affiliation: Fachbereich Biologie, Zoologie, Universität Münster, D-4400, Münster, Federal Republic of Germany.
authors.forename: Werner
authors.initials: W
authors.lastname: Bottke
authors.affiliation: Fachbereich Biologie, Zoologie, Universität Münster, D-4400, Münster, Federal Republic of Germany.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Sinha
keywords: Exogenous yolk protein; Ferritin; Snail oogenesis