Fig. 2

Morphology, growth curve and chromosome of 150,057 cells. Pavement-like arrangement in cells at (a) passage 1 (P1), (b) P7, and (c) P38. Arrows denote fibroblast-like cells. Scale bar = 1000 μm (a) or 100 μm (b–c). d Doubling time (mean ± standard deviation) of 150,057 cells at P10, P26, and P41 (n = 3 each). (e) The chromosome pattern exhibited a hypodiploid distribution. f The analysis of chromosomal number revealed abnormalities