taking into consideration the developmental changes in the mol wt pattern of ir-dyn- ( 1-17 ) , authentic dyn- ( 1-17 ) was 5 times lower in concentration than dyn- ( 1-8 ) in 3-day-old rats , whereas in adults these opioid peptides occurred in equimolar concentrations .
C0013355
dyn
C0205753
opioid peptides