Biotin-β-Amyloid (1-42), human TFA (Biotin-Amyloid β-Peptide (1-42) (human) TFA) is the botin labeled β-Amyloid (1-42), human TFA. β-Amyloid (1-42), human TFA is a 42-amino acid peptide which plays a key role in the pathogenesis of Alzheimer disease[1].