title: [Nucleotide composition of constitutive heterochromatin of Pleurodeles waltlii].
abstract: Complementary to previous works implying other staining or labeling techniques, this study used chromomycin A3, a specific fluorochrome for G and C bases, to show that in Pleurodeles waltlii Michah. (Amphibian, Urodele) the mitotic chromosome specific heterochromatin consisted of a DNA particularly rich in either of the two types of bases and the near constant presence of argyrophilic proteins. The more the DNA was rich in A and T bases, the more the argyrophilic proteins were abundant.
mesh_terms: D000818:Animals; D014128:Chromomycin A3; D002875:Chromosomes / Q000648:ultrastructure; D004247:DNA / Q000032:analysis; D006570:Heterochromatin / Q000032:analysis*; D008938:Mitosis; D010999:Pleurodeles / Q000235:genetics*; D012455:Salamandridae / Q000235:genetics*
chemical_list: D006570:Heterochromatin; D004247:DNA; D014128:Chromomycin A3
vernacular_title: Composition nucléotidique de l'hétérochromatine constitutive de Pleurodeles waltlii.