Biochemistry A common feature of all serine proteases is: A Autocatalytic activitation of zymogen precursor B Tight binding of pancreatic trypsin inhibitor C Cleavage of protein on the carboxyl site of serine residues D Presence of Ser-His_Asp catalytic triad at the active site 💡 Explanation A common feature of all serine proteases is: ✓ Correct Answer: D. Presence of Ser-His_Asp catalytic triad at the active site