M. Siam et al., MAXIMUM BINDING-CAPACITY OF SERUM-ALBUMIN FOR BILIRUBIN IS ONE, AS REVEALED BY CIRCULAR-DICHROISM, Perkin transactions. 2, (4), 1998, pp. 853-856
A reinvestigation of the binding capacity of bovine serum albumin (BSA
) and human serum albumin (HSA), respectively, for bilirubin (BR) at p
H 7.4 is presented using circular dichroism (CD), UV-VIS spectroscopy
and light scattering measurements. Evidence is provided that mixtures
of either SAs with BR do not form true solutions in aqueous buffer if
the excess of BR over SA exceeds ca. 1.4 equivalents, The study throws
doubt on multiple BR binding onto SA at pathophysiological conditions
and on the significance of this process for lowering the concentratio
n in unbound BR.