the levels in lumbar cerebrospinal fluid ( csf ) of neuropeptide y ( npy ) , methionine enkephalin ( enk ) , and enk contained in amino- and carboxy-terminus extended forms ( x-enk ) were examined in nine control patients undergoing elective surgical procedures and in eight patients with advanced parkinson 's disease , before and after the autologous transplantation of adrenal medullary fragments into the right caudate nucleus .
C0014295
methionine enkephalin
C0014298
enk