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. 2005 May 28:243–250. doi: 10.1016/B0-12-369397-7/00475-1

Figure 1.

Figure 1

One cycle of a PCR. (A) The template is shown as a double-stranded DNA molecule, which is denatured to two single strands. (B) The short oligonucleotide primers anneal to the complementary regions of the single strands. (C) The polymerase generates a new strand from each single-stranded molecule, creating two double-stranded molecules.