The FT-IR spectra of BSA-Catechin system (T = 298 K).

Panel (A) curve denote free BSA and panel (B), (C), (D) and (E) curves denote BSA-EC (1∶1), BSA-EC (1∶2), BSA-ECG (1∶1) and BSA-ECG (1∶2) respectively in the region of 1300–1800 cm−1. The values in brackets denote molar ratios of the respective BSA-catechin complexes.