we examined the effect of ischaemic pain and sustained isometric muscle contraction on plasma immunoreactive gamma-lipotropin ( gamma lph ) , beta-endorphin/beta-lipotropin ( beta end/beta lph ) and corticotropin ( acth ) , which are all synthesized from a common precursor ( pro-opiocortin ) , and plasma cortisol in 10 normal subjects .
C0023832
beta
C0033195
pro-opiocortin