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- W2028759964 abstract "Purified alpha-2-macroglobulin may be resolved into as many as five electrophoretic bands on selected polyacrylamide gel systems. The microheterogeneity does not result from prior proteolytic attack but appears to correspond to different conformational states of the inhibitor. Trypsin binding capacity and the extent of subunit cleavage into 120,000 and 70,000 dalton fragments by mild alkaline treatment are related to the proportion of fast and slow electrophoretic forms. Study of proteinase binding after electrophoretic separation by special zymogram techniques confirms that the fastest electrophoretic form has very low binding capacity. No electrophoretic differences conld be observed in alpha-2-macroglobulin derived from cystic fibrosis plasma relative to control alpha-2-macroglobulin. Alpha-2-macroglobulin appears to exist as a simple, slow electrophoretic form in fresh plasma but converts into faster forms upon aging the plasma or during purification. Characterization of the electrophoretic microhetergeneity of alpha-2-macroglobulin preparations should be a prerequisite for the study of its proteinase binding properties." @default.
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- W2028759964 date "1980-05-01" @default.
- W2028759964 modified "2023-09-27" @default.
- W2028759964 title "Human alpha-2-macroglobulin. Studies on the electrophoretic heterogeneity" @default.
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- W2028759964 doi "https://doi.org/10.1016/0005-2795(80)90006-9" @default.
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