haematohiston
Definition
Noun A colorless protein that remains after the heme group is removed from hemoglobin. It is the globin protein component of hemoglobin, the oxygen-carrying compound in red blood cells.
Usage
This is a highly specialized biochemical term. It is used in scientific contexts, particularly in biochemistry, physiology, and hematology, to refer specifically to the protein part of the hemoglobin molecule.
Examples
- Scientific Context:
- The study focused on the structural changes in haematohiston when it binds to oxygen.
- After extracting the heme, the remaining haematohiston was analyzed for its amino acid sequence.
Advanced Usage
- The term is synonymous with globin, which is the more commonly used term in modern scientific literature.
- It is often discussed in the context of hemoglobin's quaternary structure, where haematohiston chains (alpha and beta globins) combine with heme groups.
Variants and Related Words
- Globin (noun): The more common and preferred term for the protein component of hemoglobin and myoglobin.
- Hemoglobin (noun): The complete iron-containing protein in red blood cells, composed of haematohiston (globin) and heme.
- Heme (noun): The iron-containing, non-protein pigment group that binds to globin to form hemoglobin.
Synonyms
- Globin: The standard term for the protein moiety of hemoglobin.
Notes on Usage
- Haematohiston is a technical term derived from "haemato-" (blood) and "histone" (a type of protein). Its spelling variant hematohiston (with a single 'a') is also accepted, following American English conventions.
- In contemporary scientific writing, globin is overwhelmingly preferred. Haematohiston may be encountered in older texts or very specific historical contexts.
Noun
-
a colorless protein obtained by removing heme from hemoglobin; the oxygen carrying compound in red blood cells
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