0 votes 0 votes How many different protein sequences of $100$ residues can be generated using $20$ standard amino acids? $100^{20}$ $100 \times 20$ $20^{100}$ $100! \times 20!$ Others gate2015 + – Milicevic3306 asked Mar 26, 2018 edited Nov 29, 2020 by go_editor Milicevic3306 7.9k points answer comment Share Follow See all 0 reply Please log in or register to add a comment.