IRS1 and IRS2 are part of the insulin or insulin like {HEAD ~ growth factor} signaling {TAIL ~ pathway} 
signaling
IRS1 and IRS2 are part of the insulin or insulin like { HEAD ~ growth factor } signaling { TAIL ~ pathway }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL