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. 1974 Jan;76(1):99–108. doi: 10.1093/genetics/76.1.99

An Electrophoretically Silent Polymorphism for the Beta Chains of Rabbit Hemoglobin and Associated Polyribosome Patterns

Michael D Garrick 1, J Bricker 1, Laura M Garrick 1
PMCID: PMC1213058  PMID: 4818267

Abstract

The β chain of rabbit (Oryctolagus caniculus) hemoglobin has previously been reported to contain a single residue of isoleucine at β112. We have detected other rabbits with either zero isoleucyl residues or half a residue per β chain. This character is polymorphic and inherited as a simple mendelian autosomal codominant.—Normally the modal number of ribosomes per polyribosome is 4 to 6 in reticulocyte lysates; but incubation of rabbit reticulocytes prior to lysis with L-o-methylthreonine (OMT), an isostere of isoleucine, leads to a bimodal distribution in lysates with 2–3 and 8–12 ribosomes as modes. This alteration has been attributed to ribosomal traffic jams caused by starvation for ile-tRNA at mRNA codons corresponding to the locations of isoleucyl residues at positions α10, α17, α55 and β112. We have confirmed this interpretation by incubating OMT with reticulocytes from rabbits with integral, half integral and nil values for isoleucyl residues per β chain to show that formation of the larger clusters of polyribosomes requires that β112 = ile.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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