Β-ENDORPHIN-LIKE PEPTIDE SLTCLVKGFY IS A SELECTIVE AGONIST OF NONOPIOID Β-ENDORPHIN RECEPTOR ArticleNavolotskaya E.V., Zargarova T.A., Malkova N.V., Krasnova S.B., Lipkin V.M., Zav’Yalov V.P.Biochemical and Biophysical Research Communications. Vol. 292. 2002. P.. 799-804