Control of Haemoglobin Synthesis: a Difference in the Size of the Polysomes making α and β Chains View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1968-11

AUTHORS

R. T. HUNT, A. R. HUNTER, A. J. MUNRO

ABSTRACT

HAEMOGLOBIN is composed of equimolar amounts of α and β chains. Although it is not essential to synthesize the same number of molecules of each chain, this was originally thought to be the case1. The finding of a pool of α chains in rabbit reticulocytes implies that either at some stage there has been excess synthesis of α chains, or that the α chains are continually produced in excess of β chains2–4. An understanding of the mechanisms which control the balance of the synthesis of the two chains requires elucidation of the rate limiting steps in the assembly of each chain and the factors which affect those steps. We have already shown that the ribosomes which make each chain are evenly distributed on their respective mRNAs, thus demonstrating that there are no single rate limiting steps in the translation of the two chains by the ribosomes, other than in the process of initiation5. In this work we discovered that polysomes containing relatively few ribosomes carried more nascent α chains than nascent β chains, and that large polysomes carried more β chains than α chains. Here we report experiments which describe this phenomenon. More... »

PAGES

481-483

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/220481a0

DOI

http://dx.doi.org/10.1038/220481a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1048085605

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/5686164


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