D9E

D9E is an alphanumeric designation used in multiple domains to label variants, components, or items within formal naming systems. Its exact meaning varies by context, and it often functions as a concise identifier within catalogs, datasets, or scientific literature.

In biochemistry and molecular biology, D9E commonly appears as a mutation notation for proteins. It indicates a missense substitution at residue 9, where the amino acid aspartic acid (represented by the letter D) is replaced by glutamic acid (E). The notation D9E by itself does not convey functional consequences and must be interpreted together with the specific protein sequence and experimental context.

In electronics and engineering, D9E may serve as a model or catalog code for parts, devices, or assemblies. It can denote a particular revision, variant, or configuration within a product line. The precise specification attached to a D9E label depends on the manufacturer or standards that govern the component.

In other domains, D9E can appear as an identifier within standards, research datasets, or experimental configurations. It may be used as part of versioning schemes where letters following a digit indicate successive design iterations or feature sets.

Because D9E is an ambiguous designation, disambiguation is required to interpret its meaning in a given case. Readers should consult domain-specific documentation or accompanying metadata to determine the precise definition of D9E in that context.