The biologically active adduct support of claim 8, wherein the azlactone-functional polymeric support has units of the formula: ##STR13## wherein R1 is H or CH3,R2 and R3 each independently is an alkyl group having 1 to 14 carbon atoms, a cycloalkyl group having 3 to 14 carbon atoms, an aryl group having 5 to 12 ring atoms, an arenyl group having 6 to 26 carbon and 0 to 3 S, N, and nonperoxidic O