Isolation and characterization of alpha-macroglobulin from guinea pig plasma.

Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Research Abstract Details 

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Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Abstract Text:

Y Suzuki,H Sinohara,

Guinea pig alpha-macroglobulin was purified to apparent homogeneity by sequential chromatography on Sephacryl S-300, DEAE-cellulose, and hydroxyapatite. A molecular weight of 780,000 was obtained by equilibrium sedimentation. The preparation migrated as a single band of Mr = 180,000 in sodium dodecyl sulfate-polyacrylamide gel electrophoresis under reducing conditions. Rabbit antiserum raised against the final preparation partially cross-reacted with human and rat alpha-2-macroglobulins but not with rat alpha-1-macroglobulin. Guinea pig alpha-macroglobulin stimulated the amidolytic activity of trypsin towards a small substrate, but inhibited the proteolytic activity of trypsin towards remazol brilliant blue hide powder. When treated with trypsin or methylamine, four thiol groups per molecule were newly generated. The reaction with trypsin proceeded with at least at two different rates: half of the thiol groups were generated in a fast reaction and the remaining half in a slower reaction. On the other hand, such a two-step reaction was not detected in the reaction with methylamine. The methylamine-treated alpha-macroglobulin retained half the capacity to bind trypsin and its mobility in polyacrylamide gel under nondenaturing conditions remained virtually unchanged. These properties are in marked contrast to those reported for human alpha-2-macroglobulin, but resemble those of rat alpha-2- and mouse alpha-macroglobulins. The amidase activity of trypsin bound to guinea pig alpha-macroglobulin was impaired by soybean trypsin inhibitor to a much greater degree than that of trypsin bound to human or rat alpha-2-macroglobulin.

Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Publishing Authors By Initials

Y Suzuki,H Sinohara,

For similar proteins: blood proteins: acute-phase proteins: alpha-macroglobulins research abstracts see: proteins: blood proteins: acute-phase proteins: alpha-macroglobulins research

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Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of biochemistry

VOLUME: 99

Page Numbers: 1655-65

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Jun

YEAR: 1986

Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Information

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LANGUAGE: eng

NlmUniqueID: 376600

Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Keywords Mesh Terms:

KEYWORDS: alpha-Macroglobulins

MESH TERMS: isolation & purification

Chemical & Substance for Abstract: Isolation and characterization of alpha-macroglobulin from guinea pig plasma. Information

Substance Name: Trypsin

Registry Number: EC 3.4.21.4

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Country: JAPAN

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MEDLINETA: J Biochem

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