<P> Disulfide bonds in proteins are formed between the thiol groups of cysteine residues by the process of oxidative folding . The other sulfur - containing amino acid , methionine , can not form disulfide bonds . A disulfide bond is typically denoted by hyphenating the abbreviations for cysteine , e.g. , when referring to ribonuclease A the `` Cys26 -- Cys84 disulfide bond '' , or the `` 26 -- 84 disulfide bond '' , or most simply as `` C26 -- C84 '' where the disulfide bond is understood and does not need to be mentioned . The prototype of a protein disulfide bond is the two - amino - acid peptide cystine , which is composed of two cysteine amino acids joined by a disulfide bond ( shown in Figure 3 in its unionized form ) . The structure of a disulfide bond can be described by its χ dihedral angle between the C − S − S − C atoms , which is usually close to ± 90 ° . </P>
<P> Disulfide bonds in proteins are formed between the thiol groups of cysteine residues by the process of oxidative folding . The other sulfur - containing amino acid , methionine , can not form disulfide bonds . A disulfide bond is typically denoted by hyphenating the abbreviations for cysteine , e.g. , when referring to ribonuclease A the `` Cys26 -- Cys84 disulfide bond '' , or the `` 26 -- 84 disulfide bond '' , or most simply as `` C26 -- C84 '' where the disulfide bond is understood and does not need to be mentioned . The prototype of a protein disulfide bond is the two - amino - acid peptide cystine , which is composed of two cysteine amino acids joined by a disulfide bond ( shown in Figure 3 in its unionized form ) . The structure of a disulfide bond can be described by its χ dihedral angle between the C − S − S − C atoms , which is usually close to ± 90 ° . </P>
disulphide bond in a protein is generated between
disulphide bond in a protein is generated between
the thiol groups of cysteine residues
the thiol groups of cysteine residues