[Probabilistic evaluation of homology of primary protein structures]

Criteria have been developed for resemblance of segments of certain length of different proteins to be considered as an evidence of those proteins relationship. A table is formed of minimal numbers of identical amino acids for which the probability of the causal coincidence in a segment of certain length is less then 1%. The criteria were corroborated by comparison of natural proteins and model amino acid sequences concocted by means of the random numbers generator.