The ratio of {HEAD ~ the MI2} of {TAIL ~ fraction} to the MI5 of fraction may exceed 25000, or even 30000 
of
The ratio of { HEAD ~ the MI2 } of { TAIL ~ fraction } to the MI5 of fraction may exceed 25000 , or even 30000
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH