The term determinant is used here in a broad sense to denote that portion of the biological entity involved in and responsible for selective binding to {TAIL ~ a specific binding substance}, {HEAD ~ the presence} of which is required for selective binding to occur 
of
The term determinant is used here in a broad sense to denote that portion of the biological entity involved in and responsible for selective binding to { TAIL ~ a specific binding substance } , { HEAD ~ the presence } of which is required for selective binding to occur
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH OTH OTH