申请人:MEDICAL RESEARCH COUNCIL
                            
                            
                                公开号:US20150005481A1
                            
                            
                                公开(公告)日:2015-01-01
                            
                            The invention relates to a polypeptide comprising an amino acid having a norbornene group. Suitably said norbornene group is present as an amino acid residue of a norbornene lysine. The invention also relates to a method of producing a polypeptide comprising a norbornene group, said method comprising genetically incorporating an amino acid comprising a norbornene group into a polypeptide. The polypeptide comprising the norbornene group can be specifically labelled by inverse electron demand Diels-Alder reaction with a tetrazine compound.