[Classification of lectins as universal regulator molecules of biological systems].

Modern concepts of lectin classification reflecting tendencies in the development of functional classification of lectins (Ln) and Ln-like proteins are presented. Classification of bacterial Ln is proposed. Classification of Ln and Ln-like proteins of plants, animals, and bacteria is based on 8 major elements of protein secondary structure that allows for the evaluation of topographic diversity of their surfaces, potential compatibility of bacterial, vegetable, and mammalian Ln molecules and possible variants of their co-functioning.