Publication in May 1971:
Working with pig preparations, the authors reinvestigated the peptide that they had previously isolated, which acted as an LH-FSH releasing hormone. They performed an Edman-dansyl degradation procedure on the substance. This resulted in “amino acid sequence of porcine LH-RH/FSH-RH is thus (pyro)Glu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2.”

Publication in September 1971: 
A.V. Schally, A. Arimura, A.J. Kastin et. al., Gonadotropin-Releasing Hormone: One polypeptide regulates secretion of luteinizing and follicle-stimulating hormones, Science, 173, 1971, 1036-1037.

         The Authors proved that the peptide discovered and sequenced by them in May of 1971 is the substance capable of stimulating release of LH and FSH. They synthesized the substance and compared its physiological action to the native peptide found in the pig. When they compared the action of both they found them identical, and stated “when they chemically or enzymatically inactivate the synthesized LH-RH they observe a loss of FSH-releasing activity,” an irrefutable proof of its physiological action.

In 1977 Schally shared half of the Nobel Prize in Physiology or Medicine with Roger Guillemin "for their discoveries concerning the peptide hormone production of the brain." The other half was awarded to Rosalyn Yalow for "for the development of radioimmunoassays of peptide hormones."

(Thanks to Juan Weiss for these references and their interpretation.)