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Effect of temperature on ppp(A2'p)nA binding protein activities in rabbit reticulocyte lysates and other mammalian extracts.

Abstract：

:Lysates of rabbit reticulocytes and other mammalian cells are known to contain an activity which binds with high specificity ppp(A2'p)3A,3'-[32P]pCp. The binding activity shows a marked dependence on preincubation of lysates at different temperatures (4 degrees C - 45 degrees C). For example, binding was increased 50% by preincubation of rabbit reticulocyte lysates at 37 degrees C for 60 minutes. An identical preincubation of mouse brain extracts results in a greater than 90% loss of binding activity. Fractionation of rabbit reticulocyte lysates into the postribosomal supernatant (PRS) and the ribosomal salt wash (RSW), followed by heparin-agarose column chromatography, showed that with the PRS fraction, most of the binding activity is eluted with 600 mM KCl. With the RSW fraction, more than 50% of the binding activity is eluted with 250 mM KCl. These data suggest that multiple ppp(A2'p)nA binding protein activities exist in mammalian cells.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Wu JM,Eslami B,Semproni AR

doi

10.1016/0006-291x(83)91540-1

subject

Has Abstract

pub_date

1983-11-30 00:00:00

pages

57-64

issue

1

eissn

0006-291X

issn

1090-2104

pii

0006-291X(83)91540-1

journal_volume

117

pub_type

杂志文章

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