ISSN:
0021-9541
Keywords:
Life and Medical Sciences
;
Cell & Developmental Biology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Medicine
Notes:
A procedure for the bulk isolation of glia maturation factor (GMF) in high yield and high purity from bovine brains is outlined. The method involves extraction by homogenization and centrifugation, followed by ammonium sulfate precipitation and column chromatography with diethylaminoethyl (DEAE) Sephacel, Sephadex G-75, and hydroxylapatite. The method results in a 10,000-fold purification, a purity exceeding that of previously published procedures, and enables us to handle as much as 2.8 kg brain tissue or eight brains/week. The ability to mass-produce GMF with this method greatly facilitates its biological studies, further purification, and chemical characterization. The isolated GMF shows a molecular weight of 13,000 on Bio-gel P-30 column and an isoelectric point of about 5.4 on isoelectric focusing. The isolated GMF is heat labile and susceptible to papain and ficin but relatively resistant to trypsin, neuraminidase, and endoglycosidase.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jcp.1041190302
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