Table 2

Model Parameters

Parameter
Stem Cell Niche
Immortal Lineages

Stem Cells per Crypt
4–256
2
Probability of Asymmetric Stem Cell Division (P1)*
0.98 to 0.89
1.0
Probability of Symmetric Stem Cell Division: zero (P0) or two (P2) stem cell offspring*
0.02 to 0.11
0
Methylation Error Rate
2 × 10-5 per CpG site per division**
2 × 10-5 per CpG site per division**
Stem Cell Division Rate
0.75 per day
0.75 per day

*P0+P1+P2 = 1, with P0 = P2

** Equal probabilities for methylation and demethylation errors

Kim et al. BMC Medicine 2005 3:10   doi:10.1186/1741-7015-3-10