Answers are grounded in this paper and cite their sources.
Twenty-three BK virus and JC virus DNA samples obtained from urine of pregnant women had almost exclusively archetypal transcriptional control regions. Rearrangements characteristic of laboratory strains are apparently not required for reactivation in humans. Unexpectedly, alignment shows that many elements identified previously in the BK virus enhancer are conserved in the JC virus archetype.
No takes yet. Share an insight, caveat, or question.
Markowitz et al. (1991) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: