beta-EndorphinEndorphinsEnkephalinsEnkephalin, MethionineEnkephalin, LeucineEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Enkephalin, Leucine-2-Alaninebeta-LipotropinEnkephalin, D-Penicillamine (2,5)-Adrenocorticotropic HormoneMelanocyte-Stimulating HormonesPituitary Hormones, AnteriorNaloxonePro-OpiomelanocortinN-Terminal AcetyltransferasesPituitary Gland