- One of various structurally related forms of an enzyme, each having the same mechanism but with differing chemical, physical, or immunological characteristics.
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- different form of the same enzyme, such as from another tissue or species, membrane-bound vs. soluble, secreted vs. intracellular, or oligomerized to a different degree.
Definition from: CRISP Thesaurus via Unified Medical Language System at the National Library of Medicine
- Any of two or more chemically distinct but functionally similar enzymes -- called also isozyme.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.