Factors affecting the binding of tricyclic tranquillizers and antidepressants to human serum albumin

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Abstract
The linear free energy-related model for structure activity relations developed by Hansch & Fujita (1964) has been used to correlate the binding of tricyclic tranquillizers and antidepressants to human serum albumin (HSA) with hydrophobic and electronic parameters. The parameters chosen being the chromatographic parameter (Rm) and the affinity of charge transfer complex formation (kc). The relative importance of these factors has been assessed by linear and multiple linear regression analysis. Results show that the major factor in binding is electronic with only a minor contribution from the hydrophobic parameter.