Rossier J, Vargo TM, Minick S, Ling N, Bloom FE, Guillemin R (1977) Regional dissociation of beta-endorphin and enkephalin contents in rat brain and pituitary. Proc Natl Acad Sci U S A 74(11):5162-5165. doi: 10.1073/pnas.74.11.5162
Usage: radioimmunoassay (1:5,000)
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