Endpoint product analysis of PG–RCA. (A) Endpoint products in the presence or absence of 500 amol sample DNA were analyzed on 1.0% agarose gel electrophoresis. The reaction was conducted at 60°C for 30, 45, 60, 75, 90, 105 and 120 min and each reaction was analyzed separately. Lane M was loaded with a 100 bp DNA marker (100, 200, 300, 400, 500/517, 600, 700, 800, 900, 1000, 1200 and 1517 bp from the bottom). (B) Endpoint products of 90-min reactions with all or partial reaction components were analyzed on 1.0% agarose gel electrophoresis. DNA, POL and NICK indicate sample DNA, Vent (exo-) DNA polymerase and Nb.BsmI, respectively. Lane M is a 100 bp DNA marker. (C) Endpoint product of a 120-min PG–RCA reaction was digested with either BsmI or BbvCI and analyzed on 1.5% agarose gel electrophoresis. Lane ‘-’ was loaded with the 120 min reaction product before restriction enzyme digestion. Lane M is a 100 bp DNA marker.