>tr|C9E9Z9|C9E9Z9_HUMAN Mu opioid receptor (Fragment) OS=Homo sapiens OX=9606 GN=OPRM1 PE=4 SV=1 MDSSAAPTNASNCTDALAYSSCSPAPSPGSWVNLSHLDGNLSDPCGPNRTDLGGRDSLCP PTGSPSMITAITIMALYSIVCVVGLFGNFLVMYVIV