We have found in this report. and an earlier one, that in a variety of inst
ances an inverted parabolic relationship between biological activity and CM
R or logP is observed. That is, activity first decreases as CMR or logP inc
reases and then turns about and increases. This could be attributed to the
ligands causing a change in the receptor structure. The present report cons
iders QSAR for a variety of resistant and sensitive cancer cells. (C) 2001
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