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