Names serve different purposes
A peptide may be described by a full amino-acid sequence, a common research abbreviation, a fragment designation, or a catalog name. These labels are not always interchangeable, so researchers should confirm the exact identity intended by the documentation.
Sequence and residue notation
Sequences are commonly represented with amino-acid names or letter codes arranged from one end of the chain to the other. Small changes in sequence can describe a different molecule, even when common names look similar.
Fragments and modifications
Numbers in a name may identify a sequence region, while suffixes or qualifiers may indicate a chemical modification or presentation. The meaning should be verified from authoritative product or study documentation rather than inferred from the label alone.
Catalog names and traceability
Use the catalog identifier, lot, and accompanying analytical documentation to distinguish similarly named products. A familiar abbreviation is not a substitute for traceable identity information.