Analytical quality
What Disulfide-Bond Mapping Reveals
Disulfide-bond mapping: Was connectivity established as well as counting cysteines?
Source editorial review:
Before interpreting the result
Was connectivity established as well as counting cysteines?
- Record the proposed architecture of bonds between residues.
- Distinguish intact mass, reducing conditions and evidence for linked fragments.
- Review whether alternative connectivities compatible with the composition were resolved.
Disulfide-bond mapping
The presence of residues capable of disulfide formation does not specify which pairs are connected. Connectivity can matter to structural description. Total mass provides limited information about arrangements sharing composition; relevant mapping seeks evidence for particular bonds and must be interpreted within achieved coverage.
A reading case: what to check
If a page claims a structure with several bonds, check what measurement supports their arrangement rather than only the expected bond count. Mark unresolved regions and alternatives the analysis leaves open. A partial assignment remains valuable when presented as partial, without turning a theoretical diagram into a measured result.
What to preserve in the record
Correct composition does not by itself determine which residues are connected. Preserve the mapping's scope when assigning a structure to the material.
Questions and answers
Was connectivity established as well as counting cysteines?
The presence of residues capable of disulfide formation does not specify which pairs are connected. Connectivity can matter to structural description. Total mass provides limited information about arrangements sharing composition; relevant mapping seeks evidence for particular bonds and must be interpreted within achieved coverage.
What should the review record preserve?
Correct composition does not by itself determine which residues are connected. Preserve the mapping's scope when assigning a structure to the material.
Sources
- Rapid, automated characterization of disulfide bond scrambling and IgG2 isoform determination.
- Fast and Efficient non-reduced Lys-C digest using pressure cycling technology for antibody disulfide mapping by LC-MS.
- Simplified identification of disulfide, trisulfide, and thioether pairs with 213 nm UVPD.