Definition

Noun: A reddish-brown crystalline compound that is the chloride salt of hemin. It is formed from hemoglobin and is used in laboratory tests as a standard or indicator for the presence of blood.

Usage

Protohemin is a specific chemical substance used primarily in scientific and medical contexts. * The laboratory technician used protohemin as a reference standard in the blood detection assay. * The formation of protohemin crystals is a classic test for confirming the presence of blood in a forensic sample.

Advanced Usage

• Chemical Analysis: Protohemin serves as a key comparative standard in spectroscopic analysis to identify heme derivatives in biological samples.
• Biochemical Research: In research, protohemin is used to study the properties of heme and its role in various biological processes.

Variants and Related Words

• Hemin (noun): The general term for the iron-containing porphyrin compound, of which protohemin is a specific chloride salt.
• Heme (noun): The iron-porphyrin complex that is a component of hemoglobin and other proteins. Protohemin is derived from heme.

Synonyms

• Hemin chloride
• Ferriheme chloride

Notes on Meaning

This word has a single, highly specialized meaning in biochemistry and analytical chemistry. It refers exclusively to the specific chemical compound produced from hemoglobin for testing purposes.

Noun

1. a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood