Β-ENDORPHIN-LIKE PEPTIDE SLTCLVKGFY IS A SELECTIVE AGONIST OF NONOPIOID Β-ENDORPHIN RECEPTOR Article Navolotskaya 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