Linked Life Data

1515866

Source:http://linkedlifedata.com/resource/pubmed/id/1515866

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-10-2
pubmed:abstractText
A freeze-fracture study was carried out on spermatid and spermatozoon of the mosquito Culex quinquefasciatus. In the spermatid plasma membrane few and randomly distributed intramembranous particles were observed. In the spermatozoon the density of intramembranous particles was higher on the P- than on the E-fracture face of the plasma membrane. Two populations of particles were observed. Large particles (about 15 nm in diameter) are regularly arranged in double rows as a zipper-line, longitudinally oriented in relation to the main cell axis. These strands of particles were observed in the posterior head region, mainly associated with the E-fracture face. Filipin was used to analyse the presence and distribution of cholesterol in thin sections and freeze-fracture replicas. Filipin-sterol complexes were not homogeneously distributed throughout the spermatozoon plasma membrane. They were more abundant on the P-fracture face of the membrane lining the nuclear region. The results obtained show that Culex spermatozoon differs from those of other species in that its plasma membrane exhibits only a membrane domain, the zipper-line, localized in the postacrosomal region.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0248-4900
pubmed:author
pubmed:issnType
Print
pubmed:volume
75
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
37-44
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Distribution of intramembranous particles and filipin-sterol complexes in the spermatid and spermatozoon of Culex quinquefasciatus (Culicidae).
pubmed:affiliation
Laboratório de Ultraestrutura Celular Hertha Meyer, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Brasil.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't