The purpose of our study was to extract placenta bioactive peptides from deer placenta, and to determine its physical and chemical properties and immune activity. we want to see whether they were consistent with the activity of people placenta peptide. This can provide a basis for the deep study of the deer placenta peptide and the treatment of human or animal disease used by deer placenta peptide in the future. So it can explore a new type of immuno-modulator, and make full use of such deer by-produ...