The hemagglutinative activities of these proteins also differ. The hemagglutinative activity of A. polytricha lectin was inhibited by d-galactose and lactose, but these sugars did not inhibit that of APP. Additionally, APP includes half-cystine and methionine ( Table 1), but A. polytricha lectin lacks both of these amino acids and is, in this sense, much closer to the fungal immunomodulatory protein family