title: Occurrence of ubiquitin during spermiogenesis in Chara vulgaris.
abstract: Experiments with an anti-ubiquitin antibody proved the presence of ubiquitin in spermatids at all spermiogenesis stages in Charta vulgaris. Its level increased before marked ultrastructural changes of spermatids correlated with disappearance of somatic proteins (histones) and appearance of protamine-type generative proteins. The obtained results seem to confirm our earlier hypotheses concerning a significant role of ubiquitin-proteasome system in Chara spermatozoid differentiation.
authors.affiliation: Department of Cytophysiology, University of Lódź, Poland. katcytof@biol.uni.lodz.pl
authors.forename: M
authors.initials: M
authors.lastname: Kwiatkowska
authors.forename: A
authors.initials: A
authors.lastname: Wojtczak
authors.forename: K
authors.initials: K
authors.lastname: Popłońska
authors.forename: A
authors.initials: A
authors.lastname: Gosek
mesh_terms: D002467:Cell Nucleus / Q000648:ultrastructure; D007150:Immunohistochemistry; D016612:Paraffin Embedding; D010944:Plants / Q000737:chemistry*; D013091:Spermatogenesis / Q000502:physiology*; D014452:Ubiquitins / Q000378:metabolism*
chemical_list: D014452:Ubiquitins