Protoporphyrin upon its binding with serum albumin changes its secondary structure due to the conversion of part of α helices into β-folding. This process results in the association of albumin globules in vitro.

Protoporphyrin upon its binding with serum albumin changes its secondary structure due to the conversion of part of α helices into β-folding. This process results in the association of albumin globules in vitro.
