Cytochrome P450 is name derived from –
**Core Concept**
Cytochrome P450 is a family of enzymes that play a crucial role in the metabolism of drugs and other xenobiotics. These enzymes are primarily found in the liver and are responsible for the oxidation of various substrates, including medications, steroids, and fatty acids.
**Why the Correct Answer is Right**
The name "Cytochrome P450" is derived from the fact that these enzymes have a peak absorbance at 450 nanometers when they are reduced and bound to carbon monoxide. This characteristic absorbance is due to the presence of a heme group in the enzyme, which is responsible for the oxidation reactions. The cytochrome P450 enzymes are highly diverse, with over 50 different isoforms identified in humans, each with distinct substrate specificity and regioselectivity.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not relate to the origin of the name "Cytochrome P450".
**Option B:** This option is incorrect because it is not the correct reason for the name "Cytochrome P450".
**Option C:** This option is incorrect because it is a different enzyme family altogether, not related to the name "Cytochrome P450".
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the cytochrome P450 enzymes are inducible, meaning that their activity can be increased by exposure to certain substances, such as barbiturates and rifampicin. This can lead to increased metabolism of certain medications, potentially reducing their efficacy.
**Correct Answer: C. Cyt P-450.