Chemical, biochemical and biotechnological preparations used in industry and science, namely, reagents for creating or modifying a protein conjugated to a drug, adjuvant, antigen, polynucleotide, another protein, nanoparticle, chemical, or other molecule that improves a biological function, and reagents for use in bioconjugation, reversible bioconjugation, irreversible bioconjugation or surface modification, all of the foregoing not for medical or veterinary use