shown below are several molecules found in animal cells, along with their mass in daltons. based on the data gathered by loewenstein, et al. which molecule(s) would be excluded from moving through gap-junction channels? molecule approximate mass (daltons) histidine (an amino acid) 100 carnosine (a dipeptide) 226 thyroid-releasing hormone (trh, a peptide hormone) 360 atp 551 insulin (a peptide hormone) 5808 hexokinase (an enzyme) 50,000