Describes different types of sequence annotations. Equivalent to the flat file FT-line. Describes the original sequence in annotations that describe natural or artifical sequence variations. Describes the variant sequence in annotations that describe natural or artifical sequence variations. Describes the sequence coordinates of the annotation. Describes the chemical entity that is bound in annotations that describe binding sites. Describes the specific part of a molecule that is bound in annotations that describe binding sites. Describes the type of a sequence annotation. Equivalent to the flat file FT feature keys, but using full terms instead of acronyms. Describes a ligand. Describes a ligand part. Describes a sequence location as either a range with a begin and end or as a position. The 'sequence' attribute is only used when the location is not on the canonical sequence displayed in the current entry. Peptide from certain data sources with its sequence and mapped positions on protein sequence, and it can be unique or non-unique to the UniProt entry.