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