title: Closely linked H2B genes in the marine copepod, Tigriopus californicus indicate a recent gene duplication or gene conversion event.
abstract: Two nonallelic histone gene clusters were characterized in the marine copepod, Tigriopus californicus. The DNA sequence of one of the clusters reveals six genes in the contiguous arrangement of H2B, H1, H3, H4, H2B and H2A. The order of genes within the second cluster is H3, H4, H2B and H2A. There is no evidence for the presence of an H1 gene in this cluster. Comparison of the three copepod H2B genes reveals a high degree of similarity between the 5' upstream regions and between the amino terminal halves of the two H2B genes found within the same cluster. From these data we infer that gene duplication and/or gene conversion events occurred within this cluster in the recent past.
authors.affiliation: Department of Biology, University of Houston, Texas 77204.
authors.forename: D
authors.initials: D
authors.lastname: Brown
authors.forename: A
authors.initials: A
authors.lastname: Cook
authors.forename: M
authors.initials: M
authors.lastname: Wagner
authors.forename: D
authors.initials: D
authors.lastname: Wells
mesh_terms: D000483:Alleles; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003445:Crustacea; D004247:DNA; D005091:Exons; D005785:Gene Conversion; D008040:Genetic Linkage; D016678:Genome; D006657:Histones / Q000235:genetics*; D008969:Molecular Sequence Data; D005810:Multigene Family; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid
chemical_list: D006657:Histones; D004247:DNA