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Purine nucleoside phosphorylase variation in the brook lamprey,Lampetra planeri(Bloch) (Petromyzone, Agnatha): Evidence for a trimeric enzyme structure

✍ Scribed by R. D. Ward; B. J. McAndrew; G. P. Wallis

Publisher: Springer
Year: 1979
Tongue: English
Weight: 270 KB
Volume: 17
Category: Article
ISSN: 0006-2928
DOI: 10.1007/bf00498966

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✦ Synopsis

Genetic evidence for a trimeric structure for purine nucleoside phosphorylase in the brook lamprey is presented. This enzyme is encoded by a single locus with two alleles segregating at frequencies of 0.98 and 0.02 in a Welsh population. It is suggested that this enzyme is likely to be a trimer in all classes of vertebrates.

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Enzyme variation in the brook lamprey, L

Enzyme variation in the brook lamprey, Lampetra planeri (Bloch), a member of the vertebrate group Agnatha

✍ R. D. Ward; B. J. McAndrew; G. P. Wallis 📂 Article 📅 1981 🏛 Springer Netherlands 🌐 English ⚖ 592 KB

A natural population of the brook lamprey, Lampetra planeri, was assayed for electrophoretically detectable variation at 30 enzyme loci. The mean heterozygosity per locus of this primitive vertebrate, a member of the Agnatha, was found to be 0.076 & 0.031, a value similar to those recorded for other