Isolation and structure elucidation of bovine pineal arginine vasopressin: arginine vasotocin not identified


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9 Scopus citations


A large number of reports have demonstrated the presence of neurohypophysial hormone‐like peptides in mammalian pineal glands and an antigonadotropic function has been ascribed to pineal arginine vasotocin (AVT). We have undertaken large scale purification of bovine pineal neurohypophysial hormone‐like substances which demonstrate mouse mammary milk‐ejection activity (ME‐activity) in vitro. Peptides with ME‐activity were extracted from more than 5 kg of bovine pineal glands. ME‐activity containing peptides were found in both high (Mr∼ 10 000–15 000) and low (Mr∼ 500–1000) Mr species from Sephadex G‐25 chromatography of 0.2 n acetic acid extracts. After ultrafiltration in 5% formic acid, the neurohypophysial hormone‐like peptides were localized to an ultrafiltration Mr 500–1000 retentate. A homogeneous peptide, which shared an identical retention time (RT) and amino acid sequence with synthetic 8‐arginine vasopressin (AVP), was isolated by serial semipreparative high performance liquid chromatography. On the other hand, the non‐mammalian nonapeptide AVT was not identified.

Original languageEnglish (US)
Pages (from-to)109-121
Number of pages13
JournalInternational journal of peptide and protein research
Issue number2
StatePublished - Aug 1990


  • arginine vasopressin
  • arginine vasotocin
  • milk ejection
  • pineal antigonadotropin
  • pineal gland

ASJC Scopus subject areas

  • Biochemistry

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