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pro vyhledávání: '"Carol Ely Hepfer"'
Publikováno v:
The American Biology Teacher. 55:216-221
Autor:
Carol Ely Hepfer, Anthony R. Kaney
Publikováno v:
The Journal of Protozoology. 27:431-434
SYNOPSIS. A protocol based on density differences between starved and fed cells and employing density gradient centrifugation has been devised to facilitate the isolation of auxotrophic mutants of cell lines derived from Tetrahymena thermophila strai
Publikováno v:
Journal of cellular physiology. 139(1)
Properties of the change from asparagine dependence (asn-) to independence (asn+) were investigated in the androgenetic haploid frog cell line ICR 2A. Two types of asn+ variants arose spontaneously during culture. Glutamine-dependent asparagine synth