LOINC Code 74585-1: Coenzyme Q cytochrome C reductase (Complex III)/Citrate synthase (Tiss) [Catalytic ratio]

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Coenzyme Q cytochrome C reductase/Citrate synthase. It is commonly used with the system or sample type Tiss.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Coenzyme Q cytochrome C reductase (Complex III)/Citrate synthase [Enzymatic activity ratio] in Tissue
• Coenzyme Q cytochrome C reductase/Citrate synthase
• Ranked ratio between the activity of complex III and citrate synthase. This ratio gives an idea about the amount of complex III activity with respect to the amount of mitochondria.
• Catalytic Concentration Ratio; Catalytic Ratio; CCrto; Chemistry; Cit Syn; Citric acid; Complex III; CoQ CyC Reduct; cyt; Cytochrome bc1 complex; Cytochrome C reductase; Enzymatic activity ratio; Point in time; Q-cytochrome c oxidoreductase; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions