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Related to isoleucine: valine, methionine


a naturally occurring amino acid produced by hydrolysis of fibrin and other proteins, one of the essential amino acids, necessary for optimal infant growth and for nitrogen equilibrium in adults.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

i·so·leu·cine (I),

2-amino-3-methylvaleric acid; the l-stereoisomer is found in almost all proteins; an isomer of leucine and, like it, a dietary essential amino acid.
Farlex Partner Medical Dictionary © Farlex 2012


An essential amino acid, C6H13NO2, that is isomeric with leucine.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


(I) (ī'sō-lū'sēn)
An l-amino acid found in almost all proteins; an isomer of leucine and, like it, a dietary essential amino acid.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


An essential AMINO ACID.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Isoleucineclick for a larger image
Fig. 198 Isoleucine . Molecular structure.

isoleucine (I, Ile)

one of 20 AMINO ACIDS common in proteins, that is nonpolar in structure and insoluble in water. The ISEOELECTRIC POINT of isoleucine is 6.0.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005


(I) (ī'sō-lū'sēn)
An l-amino acid found in almost all proteins; an isomer of leucine and, like it, a dietary essential amino acid.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Through years of persistent efforts, scientists in Creative Biolabs successfully accomplished the mission impossible, being able to unequivocally distinguish the location of leucine and isoleucine, which enables a genuine sense of 100% accuracy in de novo antibody sequencing for superior functional analysis.
The data obtained from the metabolomics analyses of livers from dairy cows exposed to HS were highly consistent with potential biomarkers (e.g., glucose, lactate, pyruvate, acetoacetate, BHBA, fumaric acid, citric acid, choline, glycine, proline, isoleucine, leucine, urea, creatinine, and orotic acid) identified in analyses of candidate biomarkers in plasma or milk in heat-stressed lactating dairy cows.
It was also observed that values of some metabolites in lavender-treated group, including alanine, glutamine, serine, isoleucine, valine, carnitine, isobutyrate, pantothenate, glucose and asparagine reversed to control values which proposed the effectiveness of the therapy (Figure 3).
Disturbed AA metabolism has long been considered a feature of obesity and associated metabolic disease; obese people have higher blood levels of the BCAAs (leucine, isoleucine, and valine) and AAA (phenylalanine and tyrosine) but lower levels of glycine than lean people [18].
The previously reported diabetes-predictive amino acid (DM-AA) score, was modeled according to the formula: z-score of log [X.sub.1] + z-score of log [X.sub.2] + z-score of log [X.sub.3] with [X.sub.j] denoting the AAs, isoleucine, tyrosine, and phenylalanine [14, 15].
The amino acid profile revealed an isoleucine level of 5.9 [micro]mol/L, leucine of 1166 [micro]mol/L, and valine of 159 [micro]mol/L.
Following initial decompensation attack, medical supportive treatments were used during increases in blood leucine, valine, and isoleucine levels during infections for 19 months' follow-up period.
With [absolute value of [P.sub.corr]] values > 0.63190 (for degree of freedom = 8) and VIP values > 1, the serum samples of the MS group compared to those of the NS group manifested upregulation of isoleucine, leucine, proline, and methanol and downregulation of glucose (Table 3).
Compared with the control group, plasma lysine (P=0.052) and methionine (P=0.082) tended to decrease in the SDPP and YE groups, but plasma isoleucine increased significantly both in the SDPP and YE groups (P<0.01), and plasma valine only increased in the YE group (P<0.05), and leucine tended to increase in the SDPP and YE groups; plasma glutamate and glutamine concentrations decreased by 20.5% (P=0.07) and 19.02% (P=0.08) in the weanling piglets from YE group.
Methionine + cysteine, tryptophan, isoleucine, valine, arginine, leucine, histidine and phenylalanine + tyrosine-to lysine ratios in digestible basis considered to formulate basal diet were respectively 103; 28; 76; 96; 103; 152; 44 and 137%.
Due to deficiency, there is abnormal oxidative decarboxylation of branch chain amino acids like leucine, isoleucine and valine.
Sequencing of RNA from a urine sample obtained on day 28 revealed a single amino acid substitution, T20I (threonine to isoleucine), in WNV prM.