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The sequence alignment of human alpha-protein (AFP) and human serum albumin (HSA). The identical amino acids are highlighted in green and the similar amino acids in light green. The proteins can be divided into three domains: the N-terminal region of 1–230 residues belongs to domain I, the middle region of 230–400 residues belongs to domain II, and in the C-terminal, the region of 400–609 residues belongs to domain III.
