Therefore , inhibitors without the electrophilic group have also been developed .
These molecules have shown toxicity due to affinity to other dipeptidyl peptidases , e.g. DPP - 2 , DPP - 8 and DPP - 9 .
Therefore , inhibitors without the electrophilic group have also been developed , but these molecules have shown toxicity due to affinity to other dipeptidyl peptidases , e.g. DPP - 2 , DPP - 8 and DPP - 9 .