| four geographically distinct genotypes of jc virus are prevalent in china and mongolia: implications for the racial composition of modern china. | jc polyomavirus (jcv) is ubiquitous in humans, persisting in renal tissue and excreting progeny in urine. it has been shown that the genotyping of urinary jcv offers a novel means of tracing human migrations. this approach was used to elucidate the racial composition of modern china. jcv isolates in the old world were previously classified into nine distinct genotypes. one of them (b1) has a wide domain, encompassing part of europe and the entirety of asia. by constructing a neighbour-joining ph ... | 1998 | 9780057 |