the ability to elicit immediate skin test reactions with endogenous opioid peptides was examined with the use of dynorphin , [ d-ala , 2-d-leu5 ] enkephalin , beta-endorphin , and morphiceptin . all four compounds induced wheal-and-flare reactions with the order of potency : dynorphin , greater than beta-endorphin , and greater than [ d-ala , 2-d-leu5 ] enkephalin approximately equal to morphiceptin at dose ranges of 0.3 to 8.45 nmol .
C0205753
endogenous opioid peptides
C0013355
dynorphin