clA

clA is an alphanumeric label encountered in various technical and scientific contexts. Unlike a clearly defined single entity, clA does not refer to one universally recognized subject; its meaning depends on the field, organism, or system in which it appears.

In biology and medicine, clA sometimes appears as an abbreviation for chloramphenicol acetyltransferase class A, an enzyme that inactivates the antibiotic chloramphenicol by acetylation. In many genetic databases the same function is more commonly labeled catA, catA1, or catA2. When used, clA typically denotes members of a class A family within a larger locus or plasmid, and researchers study its expression, regulation, and contribution to antibiotic resistance. The precise sequence, location, and regulation can differ between species and strains.

In other domains, clA may act as a project tag, model designation, or module identifier, often indicating the first class or version in a series (for example, class A component). The capitalization and surrounding context are essential for correct interpretation.

If you have a specific field, organism, or document where clA appears, providing that context will help produce a focused article. In absence of context, clA is best treated as a non-specific label used to mark a member of a Class A grouping in multiple independent systems.