in addition , using high performance liquid chromatography ( hplc ) , we have shown that the major endorphin species in mouse spleen macrophages is beta-ep1-31 , and that there are smaller amounts of each of the acetylated forms , n-acetyl-beta-ep1-16 ( alpha-endorphin ) , n-acetyl-beta-ep1-17 ( gamma-endorphin ) , n-acetyl-beta-ep1-27 , and n-acetyl-beta-ep1-31 .
C0014242
endorphin
C0051356
alpha-endorphin