Fig. 4From: A comprehensive survey of permethrin resistance in human head louse populations from northwest Iran: ex vivo and molecular monitoring of knockdown resistance allelesAgarose gel electrophoretic graph of the nested PCR products in head louse mitochondrial groups. Lanes: 1, 100-bp ladder; 2, 3, 5, 7, 9, 12–15, samples of clade B; 4, 6, 8, 10, 11, 16, samples of clade ABack to article page