78C

78C is a designation used in multiple domains to label a discrete item, region, or model. In genetics and cytogenetics, 78C is a cytogenetic band designation used on polytene chromosome maps. Such band labels help researchers describe gene locations, regulatory elements, or insertion sites. The 78C designation is part of an established chromosomal mapping system, and researchers refer to experiments targeting genes within or near this band and to nearby landmarks for mapping purposes. The exact chromosomal region corresponding to 78C depends on the organism and the specific map revision, rather than a universal genome coordinate.

Beyond biology, 78C also appears in product and model numbering. It can function as a suffix or segment within a broader code used by manufacturers or suppliers to designate a specific variant, revision, or configuration. In that context, the meaning of 78C is organization-specific and must be interpreted from accompanying documentation.

The use of alphanumeric codes like 78C is common across technical fields because they can encode location, version, or category information in a compact form. See also cytogenetic map, polytene chromosome, and product code.