ddATP ddttP ddGtP ddcTP DNA DNA DNA DNA dNTPs dNTPs dNTPs dNTPs 5 TA TAGTA Each fragment is terminated by a dda TAGTACA TAGTACAGTA TAGTACAGTAGTTCA TAGTACAGTAGTTCAGA5’ 3’ ||||||||||||||| ddATP DNA dNTPs ddTTP DNA dNTPs ddGTP DNA dNTPs ddCTP DNA dNTPs A T C A T G T C A T C A A G T C T A G C A C T A T A G T A T A G T A C A T A G T A C A G T A T A G T A C A G T A G T T C A T A G T A C A G T A G T T C A G A • Each fragment is terminated by a ddA