{TAIL ~ R5}, R6, m, and n are independent in {HEAD ~ each} of the ##STR38## subunits when p=2; or d.) 
{ TAIL ~ R5 } , R6 , m , and n are independent in { HEAD ~ each } of the # # STR38 # # subunits when p=2 ; or d. )
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH