Release of Bound Immunoglobulin from SSPE Brain by Acid Elution
1975
SSPE brain homogenate extracted at pH 7.4 yields immunoglobulin with a 4- to 5-fold greater hemagglutination inhibition activity per microgram of IgG than serum from the same patient. Serial washing of the homogenate results in a low level steady-state release of IgG. Elution of the washed sediment with pH 2.5, 0.1 M glycine buffer results in a 2- to 3-fold increase in recovery of hemagglutination inhibition activity with a greater hemagglutination inhibition activity per milligram of IgG than the IgG recovered by phosphate-saline extraction at pH 7.4.
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