histidine

American  

[his-ti-deen, -din] / ˈhɪs tɪˌdin, -dɪn /

Also histidin

noun

Biochemistry.

1. an essential amino acid, C 3 H 3 N 2 CH 2 CH(NH2 )COOH, that is a constituent of proteins and is important as the iron-binding site in hemoglobin. His; H

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histidine British  

/ ˈhɪstɪˌdiːn, -dɪn /

noun

1. a nonessential amino acid that occurs in most proteins: a precursor of histamine

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histidine Scientific  

/ hĭs′tĭ-dēn′ /

1. An amino acid that is essential for children but not for adults. Chemical formula: C ₆ H ₉ N ₃ O ₂ .

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Etymology

Origin of histidine

First recorded in 1895–1900; hist- + -id ³ + -ine ²

Example Sentences

This was not the feared 226L mutation: The amino acid had changed to a histidine instead of leucine.

From Science Magazine • Dec. 5, 2024

Given, the important roles of ATP and histidine in RNA interactions and molecular functions, these results provide novel insights into the role of RNA in early evolution, including the origin of the genetic code.

From Science Daily • Apr. 18, 2024

The sequencing data revealed a variant that substituted an amino acid called histidine for arginine.

From Scientific American • Jul. 26, 2021

And a molecule of histidine contains only so many suitable atoms.

From Economist • Feb. 23, 2012

Nothing is known, however, of the process by which the more complicated closed-ring amino-acid compounds, such as proline, histidine, or tryptophane, are synthetized.

From The Chemistry of Plant Life by Thatcher, Roscoe Wilfred