| sequence variability in three mitochondrial genes among four roundworm species from wild animals in china. | sequence variability in three mitochondrial dna (mtdna) regions, namely portions of cytochrome c oxidase subunit 1 (pcox1), nadh dehydrogenase subunit 1 (pnad1) and nadh dehydrogenase subunit 4 (pnad4), for toxocara canis. baylisacaris transfuga. ascaris suum and parascaris equorum from canis lupus. ursus thibetanus. sus scrofa and equus burchelli in china were examined. the lengths of the sequences of pcox1, pnad1 and pnad4 were 711 bp, 648 bp and 666 bp, respectively. no intra-species differen ... | 2015 | 24041450 |