To measure the activity of a test substance in accordance with the method of {TAIL ~ the present invention}, an activation reaction of {HEAD ~ a blood coagulation factor} XII is initiated 
To measure the activity of a test substance in accordance with the method of { TAIL ~ the present invention } , an activation reaction of { HEAD ~ a blood coagulation factor } XII is initiated
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH