Then, the reaction is stopped and the blood coagulation factor XII in {HEAD ~ an active form} produced in {TAIL ~ the above reaction} is quantitatively determined 
Then , the reaction is stopped and the blood coagulation factor XII in { HEAD ~ an active form } produced in { TAIL ~ the above reaction } is quantitatively determined
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH