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HISTIDINE

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his⋅ti⋅dine

[his-ti-deen, -din]
–noun Biochemistry.
an essential amino acid, C3H3N2CH2CH(NH2)COOH, that is a constituent of proteins and is important as the iron-binding site in hemoglobin. Abbreviation: His; Symbol: H
Also, his⋅ti⋅din [his-ti-din] .


Origin:
1895–1900; hist- + -id 3 + -ine 2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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his·ti·dine   (hĭs'tĭ-dēn', -dĭn)   
n.  An essential amino acid, C6H9N3O2, important for the growth and repair of tissues.

[hist(o)- + -id(e) + -ine2.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: his·ti·dine
Pronunciation: 'his-t&-"dEn
Function: noun
: a crystalline essential amino acidC6H9N3O2 formed by the hydrolysis of most proteins—abbreviation His
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

histidine his·ti·dine (hĭs'tĭ-dēn', -dĭn)
n.
Abbr. His
An amino acid that is essential for tissue growth and repair.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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