Abstract
A previous report of other researchers that aqueous phase fractions of erythrocyte stromata of secretors contained more ABH blood group activity than similar fractions of non-secretors was confirmed. The recovery of H activity in the butanol phase extracts of both secretors and non-secretors, which had not been seen previously, is reported here for the first time. Three H specificities were present when the aqueous and butanol phases of group O secretor stromata were examined in inhibition of agglutination studies with anti-H of group Oh and group A1 sera and three lectins. The anti-H (group Oh) sera were inhibited by both aqueous and butanol fractions. Anti-H serum (group A1) and the lectin Ulex europaeus were inhibited by the aqueous fraction only. The lectins Laburnum alpinum and Lotus tetragonolobus were not inhibited by either the aqueous or butanol phase extracts.
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