A Comparison of Chemical Composition and Bioactivity of Polypeptides from Velvet Antlers of Cervus nippon Temminck and Cervus elaphus Linnaeus Protective effects of peptides from velvet antler of Cervus nipponon acute ischemic myocardial injury in rats Separation and purification of protein promoting hippocampus nerve cell proliferation from pilose antler of Cervus nippon