Cobratoxin and alpha bungarotoxin have {HEAD ~ highest affinity} for {TAIL ~ NAchRs} containing the alpha 1 and 7 subunits  
for
Cobratoxin and alpha bungarotoxin have { HEAD ~ highest affinity } for { TAIL ~ NAchRs } containing the alpha 1 and 7 subunits
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH