title: Gender-associated diverse mitochondrial DNA molecules of the mussel Mytilus californianus.
abstract: The Pacific-rim, dioecious bivalve Mytilus californianus contains two distinct sequence types of mitochondrial (mt) DNA that are gender-limited in their occurrence. One type (F) is found in both females and males, but the second type (M) is strictly limited to males. Although F- and M-type mtDNAs occur in approximately equal proportion in testes, there is a preponderance of M-type in sperm. Segments of the COI and ND5 genes of F-type and M-type mtDNAs differ in nucleotide sequence by 21.1% and 31.6%, and in predicted amino-acid sequence by 7.9% and 27.1%, respectively. These latter observations raise hitherto unconsidered questions regarding the number of different variants of cytochrome c oxidase and NADH dehydrogenase that may occur in Mytilus non-gametic male cells.
authors.affiliation: Department of Biology, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: C T
authors.initials: CT
authors.lastname: Beagley
authors.forename: K A
authors.initials: KA
authors.lastname: Taylor
authors.forename: D R
authors.initials: DR
authors.lastname: Wolstenholme
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001345:Autoradiography; D001483:Base Sequence; D049872:Bivalvia / Q000235:genetics*; D017931:DNA Primers; D004272:DNA, Mitochondrial / Q000235:genetics* / Q000378:metabolism; D015252:Deoxyribonucleases, Type II Site-Specific / Q000235:genetics / Q000378:metabolism; D003576:Electron Transport Complex IV / Q000235:genetics*; D004587:Electrophoresis, Agar Gel; D005260:Female; D017403:In Situ Hybridization / Q000379:methods; D008297:Male; D008969:Molecular Sequence Data; D010053:Ovary / Q000502:physiology; D016133:Polymerase Chain Reaction / Q000379:methods; D017386:Sequence Homology, Amino Acid; D012727:Sex Characteristics; D013094:Spermatozoa / Q000502:physiology; D013737:Testis / Q000502:physiology
chemical_list: D017931:DNA Primers; D004272:DNA, Mitochondrial; D003576:Electron Transport Complex IV; C034510:CTCGAG-specific type II deoxyribonucleases; C024388:CTGCAG-specific type II deoxyribonucleases; D015252:Deoxyribonucleases, Type II Site-Specific