{HEAD ~ The biochip} 2 wherein the light blocking agent is iron oxide and wherein {TAIL ~ the cross} linking agent is avidin or streptavidin 
{ HEAD ~ The biochip } 2 wherein the light blocking agent is iron oxide and wherein { TAIL ~ the cross } linking agent is avidin or streptavidin
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH