The height of the stack is especially sensitive to minor changes in the frequency of a very frequent base (e.g. if the frequency of the most common base falls from 1.0 to 0.9 the height falls from 2.0 to 1.6).
Subsequently, variance of the most frequent base in that position is calculated from the base composition.
At each position in the reference chromosome, the most frequent base was removed and the counts of the alternate alleles, which represents error, were summed.
The C > T transitions are the most frequent base change in most organisms (Lynch 2010) and are also the main component of the aging-dependent mutational signature in cancer samples (Alexandrov et al. 2013).
The most frequent base changes were C → T and G → A, each in 17 cases, mainly at hotspot sites.
That means that if you are a frequent flier based in Chicago, where United and American have a roughly equal share of flights from O'Hare Airport, United, with its larger network, would suddenly look much more attractive than American.
A frequent traveler based in Chicago, Ms. Hebden founded Maven last year after working with a start-up called Collaborative Group that aimed to employ global artisans by partnering with socially conscious retailers.
They were deposited in a rapidly subsiding retroarc foreland basin, during frequent base-level changes.
The different codon positions have the same base distributions, with C and G as the most and least frequent bases in the third codon, respectively.
As we were interested in identifying polymorphic sites (PSs) where the mutations could occur in only a fraction of H. bizzozeronii population, we applied a model using the Breseq computational pipeline (Barrick et al. 2009), which allowed the population to have an arbitrary mixture of the two most frequent bases at each position in the genome (Jerome et al. 2011).
