The fraction of configurations with exactly and at leastNanchors. (
A) Plot of the fraction of configurations with exactly
N anchors,

, as
N varies. An anchor is a run of at least
K correct bases (shown for
K = 15, 20, and 25). We assume the read length is
L = 1000 and the error rate per base is
ρ = 15
%(and that there are exactly
M = 150 error positions). The solid markers are computed by finding exact coefficients
cM,N,K(
L) in the generating functions. The curve is a normal distribution approximating the exact values (illustrating Theorem A3), where parameters
μand
σ2are computed by Theorem A2. (
B) The solid markers are a plot of

, the fraction of configurations with at least
N anchors, as
N varies. The parameters are the same as for (A). The curve is the survival function of the normal distribution in (A).