What is the actual definition of Proline-Rich Polypeptides or PRPs?
The term applies to a class of small proteins that circulate in the blood of mammals and accumulate or concentrate in their colostrum, or in their milk, and also in their blood serum. They act as precursors that modulate cytokine production and maintain correct concentrations of these cytokines. Proline-Rich Polypeptides appear to convey information necessary for appropriate cellular function.
