Figure 1From: Enzymatic synthesis of long double-stranded DNA labeled with haloderivatives of nucleobases in a precisely pre-determined sequenceDiagram of single- and double-label incorporation with pinpoint precision internally within long DNA molecules. Br-U symbolizes incorporated 5-bromodeoxiuridine; N symbolizes unspecified nucleotides. * complementarity between the three bases within the overhang (XXX/YYY) is necessaryBack to article page