Consequently comparison of e.g. cellulase sequences including CBD or signal sequences with {HEAD ~ sequences} lacking {TAIL ~ those elements} are excluded as not being meaningful 
lacking
Consequently comparison of e.g. cellulase sequences including CBD or signal sequences with { HEAD ~ sequences } lacking { TAIL ~ those elements } are excluded as not being meaningful
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH