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Karyotype analysis of WI-38 PDL 33. Chromosome analysis was performed at a level of 400 bands or greater (Howe et al. 2014). Cells at early passage (PDL 33) and at the later passage of PDL 48 (not shown) were observed to be normal human female with 46 chromosomes, two of which were the X chromosome. No major rearrangements were observed.
