DNA synthesis in the early embryo of the nematode Ascaris suum.
We have used microspectrofluorimetry to measure the rate of DNA synthesis in the first two embryonic cell cycles of the parasitic nematode Ascaris suum. The S-phase of the early Ascaris cell cycles occupies at most 1 hr; G2 phase is prominent and occupies approximately 11 hr; no G1 phase could be detected. These results contrast with our previous measurements made with embryos of the free-living nematode Caenorhabditis elegans, in which the earliest cell cycles consist of simple alternations between S and M phases.
Azzaria
M
M
Department of Medical Biochemistry, University of Calgary, Alberta, Canada.
McGhee
J D
JD
D000818:Animals; D001200:Ascaris / Q000378:metabolism*; D004247:DNA / Q000096:biosynthesis*; D004625:Embryo, Nonmammalian / Q000378:metabolism; D005260:Female; D016193:G1 Phase; D016195:G2 Phase; D014158:Transcription, Genetic
D004247:DNA