the treatment of a temperature-resistant glutamine-independent clone of chinese hamster cells ( 237 glu+ tr ) with 5-bromodeoxyuridine ( budr ) for 48 or 72 hours at 40 degrees c and subsequent illumination with visible light was used for selection of spontaneous and n-methyl-n'-nitro-n-nitrosoguanidein-induced ts mutants .
C0017797
glutamine
C0061472
glu