LOINC Code 74586-9: Coenzyme Q cytochrome C reductase (Complex III) (Tiss) [Catalytic activity/Mass]

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. 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) [Enzymatic activity/mass] in Tissue
• Coenzyme Q cytochrome C reductase
• Determination of complex III activity by spectroscopy at 550 nm quantification. Complex III transfers electrons from ubiquinol or CoQ10 towards cytochrome c. The activity is inhibited by antimicina. It measures the increase in absorbance at 550 nm wavelength of the reduced cytochrome c. The final activity was calculated using the difference between the activity measured with and without antimicina.
• Catalytic Content; Chemistry; Complex III; CoQ CyC Reduct; cyt; Cytochrome bc1 complex; Cytochrome C reductase; 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