b) allowing sufficient time for {HEAD ~ the dye conjugate} to form {TAIL ~ a complex} with the complementary member, said complex exhibiting a detectable optical response; and 
to form
b ) allowing sufficient time for { HEAD ~ the dye conjugate } to form { TAIL ~ a complex } with the complementary member , said complex exhibiting a detectable optical response ; and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH