Long-Term Memory Effect in Spatial Series of Model Peptides Composed of Glycine and Alanine

Spatial series based on the histograms of interatomic distances are investigated by the detrended fluctuation analysis and the rescaled range method. Model glycine and alanine peptides are used as the objects of the study. The influence of the monomer type, chain length, and conformation on the values of the Hurst coefficients is analyzed. Most of the spatial series studied are shown to exhibit persistent behavior, that is, to possess long-term memory.