... obtained from Calbiochem. ( 3-( [[ 3-( 2-[ 7-chloro-2-qui-nolinyl]ethenyl)phenyl }-{ ( 3-( dimethylamino-3-oxopro-pyl)-thio}-methyl]thio) propanoic acid, MK-571, was agenerous gift of M. Turner (Merck-Frosst ... 3¢,5¢-cyclic monophosphate (cAMP),adenosine 5¢-O-(3-thiotriphosphate) (ATP-c-S), adenosinetriphosphate (ATP), 4-aminopyridine, aprotinin, 1-chloro-2,4-dinitrobenzene, clotrimazole, creatine kinase, ... substrates, including vincristine, requireGSH for their transport and that vincristine inhibits the high affinity DNP-SG transport in the presence but not in the absence of GSH [12,45,46]. Thus the effect...