AbstractTreatment of polymorphonuclear leukocytes with sialidase release about one‐half of the total sialic acid of the cells. Such treatment affects neither phagocytic ingestion nor glycolysis. These results are in contrast to earlier data in the literature that indicate suppression of both functions mentioned upon desialation of these cells. The presence of an inhibitor of glycolysis that contaminated the crude enzyme previously used is suggeste