[Study of super-structure of eukaryotic chromosomes. I. The super-structure of metaphase chromosomes in pigs].
The super-structure of fine and close metaphase chromosomes was studied with the optical micro multistage amplifying system designed by author himself, which could show the fine structure about 15nm in diameter of chromosomes. The micrographs of chromosomal super-structure made of DNA-nuclear protein or non-histone protein were shown respectively in the present paper. The chromotids were composed of long fibres about 20-30nm in diameter in a regular helical form directly. The characters and parameters of chromosomal super-structure were described, and a dynamical helical model of the chromosomal structure was suggested.
Zhan
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Department of Domestic Animal Science, Northwestern Agricultural University Shaanxi Yangling.
D000818:Animals; D002875:Chromosomes / Q000648:ultrastructure*; D008677:Metaphase; D008938:Mitosis; D013552:Swine / Q000235:genetics*