angelaavhs2540 angelaavhs2540 20-02-2024 Chemistry contestada The (pK_a₁, pK_a₂), and (pK_a₃) values for the amino acid cysteine are respectively 1.8, 8.0. The isoelectric point of cysteine amino acid is: a) 3.8 b) 4.9 c) 4.4 d) 4.5