Independent analytical testing. Results apply only to the sample received, for research use only.

Canada Peptide Testing
Request testing

Stereoisomer

Seen on limitation statements.

Definition

A molecule with the same atoms and connectivity but a different three-dimensional arrangement. D-amino-acid and retro-inverso constructs share the mass of their natural-sequence counterparts, so mass evidence cannot separate them.

Related terms

Isobaric
Having the same nominal mass as another compound.
Retro-inverso peptide
A peptide built from D-amino acids in reversed sequence order, designed to present a similar side-chain topology to the natural peptide.

About mass spectrometry

Terms a reader meets on mass-spectrometric reports from other laboratories, and on confirmatory work sent out. This laboratory has no in-house mass spectrometer, and its certificates carry no mass spectrum.

Electrospray ionisationMass-to-charge ratioCharge stateDeconvolutionObserved massTheoretical massMass accuracyIsotope patternIon suppression

Read more