Representative photomicrograph showing the results of RFLP after digestion of PCR amplified product with endonucleases, Apo1 and AfI III for Pfmdr1 gene (N86) in chloroquine sensitive Plasmodium falciparum isolates. In photograph, (M) is 100 bp DNA ladder; (C) is undigested product as control; (P) is Apo1; (F) is Afl III and (ST1-ST4) are chloroquine sensitive P. falciparum isolates.