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A comparison of methods for the isolation and fractionation of reticulocyte ribosomes.


ABSTRACT: 1. Polysomes, ribosomes and pH5 enzymes were isolated from rabbit reticulocytes by acidifying the post-mitochondrial supernatant to pH6.0 to precipitate all ribonucleoprotein particles and about half the pH5 enzymes; the precipitate was redissolved in buffer, pH7.6, and fractionated by zone centrifuging. 2. The isolation of polysome-rich and ribosome-rich fractions from the post-mitochondrial supernatant was also examined. 3. Studies of the stability of polysomes revealed that dissociation into sub-units occurred when both bound and free Mg(2+) was chelated by EDTA or when the pH was increased above pH8.8.

SUBMITTER: Arnstein HR 

PROVIDER: S-EPMC1207066 | biostudies-other | 1965 Aug

REPOSITORIES: biostudies-other

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