[The heterochromatin regions of the mitotic chromosomes in cattle].
Cytochemical and molecular peculiarities of heterochromatic regions of bovine chromosomes have been studied, using specific fluorochrome staining induced decondensation, in situ hybridization, pretreatment of restriction enzymes. The heterochromatin of autosomes demonstrated a strong homogeneity. In chromosome Y two small specific heterochromatic regions were found lacking a long repeated tandem block of nucleotides enriched in GC base pairs and having no tandem block of Bkm repeats (10(4) b.p.). This class repeats are probably interspersed in the bovine genome. A rather seldom character of mammalian karyotypes is the absence of cytochemical heterochromatin in the X chromosome.
O G
OG
Chiriaeva
A M
AM
Efimov
M G
MG
Smaragdov
S A
SA
Finashin
A F
AF
Smirnov
D000818:Animals; D001374:Azacitidine / Q000494:pharmacology; D001482:Base Composition / Q000187:drug effects; D002417:Cattle; D002478:Cells, Cultured / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure; D002871:Chromosome Banding / Q000379:methods; D002875:Chromosomes / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure*; D004262:DNA Restriction Enzymes / Q000494:pharmacology; D004276:DNA, Satellite / Q000187:drug effects; D006570:Heterochromatin / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure*; D006651:Histocytochemistry; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure; D008938:Mitosis / Q000187:drug effects; D009693:Nucleic Acid Hybridization; D012091:Repetitive Sequences, Nucleic Acid / Q000187:drug effects; D014960:X Chromosome / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure; D014998:Y Chromosome / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure
D004276:DNA, Satellite; D006570:Heterochromatin; D004262:DNA Restriction Enzymes; D001374:Azacitidine
Geterokhromatinovye uchastki mitoticheskikh khromosom krupnogo rogatogo skota.