N-acetylationC-amidationBenzyloxycarbonylation(N-Terminal)Biotin(N,Cterm)Phosphorylation-SerinePhosphorylation-TyrosinePhosphorylation-ThreonineChenodeoxycholicacid(N-Terminal)Formylation(N-Terminal)DansylationCyclization(KD,ED,CC,endtoend,etc)Palmytolicacid(N-Terminal)Disulfidebridge-oneMyristicacid(N-Terminal)Disulfidebridge-twoThioglycollicacid(N-Terminal)Disulfidebridge-threeD(+)Glucose(N-Terminal)IntermolecularDisulfidebridgeMethylester(Cterminal)ThioesterbondcyclicpeptideEthylamine(Cterminal)Amidecyclic(headtotail,sidechaintotail,headtosidechain,AsptoLys,GlutoLys)SuccinylationFattyacid(N-Terminal)Acryl(N-Terminal)FlourescenceDyeLabelingTetramethylrhodamineFluoresceinFITCCarboxyFluoreseinFam(5-FAM、6-FAM、5,6-FAM、5（6）-TAMRA)DansylSPECIALAMINOACIDSandSideChainModificationD-formaminoacidsDifferenceAccordingtotheaminocidN-Methylaminoacid(Ala,Phe,Leu,Ile,Val,Gly,Met)pGlu,Hyp,AbuOrn,Aib,(D)1-Nal,Nva,Nle,Hse,Mpa,D-ßNal,Dpr(D)4-Cl-Phe(D)2-Pal,PenHcy,HargLys(Ac)Lys(Fmoc)Lys(Biotin)Arg(Me2)Cys(Cam)(carbamidomethylated)Tyr(nitrated),Tyr(OEt),K(Acryl)K(Cbz)Met(O),Ser(Ac))