Poisson Model To Generate Isotope Distribution for Biomolecules.

ABSTRACT: We introduce a simplified computational algorithm for computing isotope distributions (relative abundances and masses) of biomolecules. The algorithm is based on Poisson approximation to binomial and multinomial distributions. It leads to a small number of arithmetic operations to compute isotope distributions of molecules. The approach uses three embedded loops to compute the isotope distributions, as compared with the eight embedded loops in exact calculations. The speed improvement is about 3-fold compared to the fast Fourier transformation-based isotope calculations, often termed as ultrafast isotope calculation. The approach naturally incorporates the determination of the masses of each molecular isotopomer. It is applicable to high mass accuracy and resolution mass spectrometry data.

SUBMITTER: Sadygov RG 

PROVIDER: S-EPMC5789464 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature