|the single most aboundant chemical substance in the body|
|produced by a predecessor protein or in response to the presence of foreign material in the body|
|creatinine (krē-āt'n-ēn', -ĭn) Pronunciation Key
A compound formed by the metabolism of creatine, found in muscle tissue and blood and normally excreted in the urine as a metabolic waste. Measurement of creatinine levels in the blood is used to evaluate kidney function. Chemical formula: C4H7N3O.