Аннотация:We present several geometrical and statistical methods analyzing infor-mation contained in Protein Data Bank for consistency and general theory fitting. In
addition, we include a list of examples demonstrating the necessity of careful anal-ysis and sampling of the PDB items. In particular, we show some examples visual-izing the distribution of disturbance level of the famous Pauling plane low. Besides,
we present a method of automatical helices finding based on discrete analogues of
curvature and torsion of smooth curve.