The invention relates to variants of Target Biological Molecules (TBMs), such as proteins, peptides and other amino acid sequences that are modified to include cysteine residues at predetermined positions within the TBM. The position of amino acid residues within the TBM that are modified to be cysteine residues is selected for its proximity to ligand binding sites within the TBM. Once an amino acid residue, or the DNA encoding the residue, is modified to cysteine, the TBM linked to potential binding ligands by forming a covalent bond through the cysteine thiol (—SH) reactive group of the variant.
本发明涉及靶
生物分子(TBM)的变异体,例如蛋白质、肽和其他
氨基酸序列,这些序列被修改以在TBM内的预定位置包括半胱
氨酸残基。所选的
氨基酸残基位置在TBM内被修改为半胱
氨酸残基,是由于其靠近TBM内
配体结合位点。一旦
氨基酸残基或编码该残基的DNA被修改为半胱
氨酸,TBM通过半胱
氨酸巯基(—SH)反应基团形成共价键与潜在的结合
配体相连。