- Presence and release of SR-17 (chromogranin B(586-602)) in the porcine splenic nerve and its enzymatic degradation by CD26/dipeptidyl peptidase IV. Depreitere, J., Durinx, C., Wang, Z., Coen, E., Lambeir, A.M., Scharpé, S., De Potter, W., Nouwen, E.J. Regul. Pept. (2002)