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Pharmacology. 1979;19(2):59-67.

Human serum albumin as a 'silent receptor' for drugs and endogenous substances.


Most drugs are bound to human serum albumin (HSA) via a few high affinity binding sites and several sites of much lower affinity. There is now increasing evidence that the actual number of high affinity drug-binding sites of HSA is rather small. Thus, each of these binding sites binds several drugs of very different chemical and pharmacological properties with relative high affinity. On the other hand these drug-binding sites can in some cases be very specific and even stereoselective, as demonstrated by the stereospecific binding of drugs to some of these binding sites. The discrepancy between both observations can be explained by the conformational adaptability of the HSA-binding sites.

[Indexed for MEDLINE]

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