disulfide bridge

Cross links formed from oxidized cysteine residues. Intracellular proteins usually lack disulfides; extracellular proteins often contain several. Oxidizing equivalents for disulfide bond formation are provided by a flavoprotein monooxygenase within the endoplasmic reticulum.

Related

cystine flavoprotein mixed function oxidase; flavoprotein monooxygenase; dimethylaniline oxidase; dimethylaniline monooxygenase [N-oxide forming] (FMO)

General

peptide motif exoplasmic motif

References

Biochemistry, L. Stryer, WH Freeman & Co, New York, 1988 pg 23, 32