Incorporation of the analog is expressed as {TAIL ~ a percent} of {HEAD ~ incorporation} of the complementary deoxynucleotide 
Incorporation of the analog is expressed as { TAIL ~ a percent } of { HEAD ~ incorporation } of the complementary deoxynucleotide
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH