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