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Related to Ampholytes: isoelectric point, zwitterion


 (zwĭt′ər-ī′ən, swĭt′-, tsvĭt′-)
A molecule, especially an amino acid, containing a positively charged ion at one end and a negatively charged ion at the other.

[German : Zwitter, hybrid (from Middle High German zwitarn, from Old High German, from zwi-, twice; see dwo- in Indo-European roots) + Ion, ion (from Greek; see ion).]

zwit′ter·i·on′ic (-ī-ŏn′ĭk) adj.


(Chemistry) chem an ion that carries both a positive and a negative charge
[C20: from German Zwitter hermaphrodite + ion]
zwitterionic adj


(ˈzwɪt ərˌaɪ ən, ˈswɪt-, ˈtsvɪt-)

an ion with both a positive and a negative charge.
[< German Zwitterion (1897) =Zwitter hybrid, hermaphrodite + Ion ion]
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References in periodicals archive ?
Immobiline DryStrips (length, 18 cm; GE Healthcare, UK), containing immobilized ampholytes forming a linear pH gradient of 4 to 7, were used for isoelectric focusing (IEF) in the first dimension.
a pioneer in designing and manufacturing the most reliable, high performance, and high throughput CEInfinite whole column imaging detection capillary isoelectric focusing (iCIEF) systems, proprietary cartridges, ampholytes, and pI standards for the life science industry, is pleased to announce Isogen Life Science B.
4% (v/v) carrier ampholytes (pH 3-10, BioRad, USA) and 50 L of protease inhibitor cocktail (Catalogue No.
Analytical method: For sample processing, was used the technique of the isoelectric focusing electrophoresis (IEF), in which the separation of hemoglobin was performed by loading a blood sample on an agarose gel containing ampholytes with a pH between 6 and 8 and quantified by densitometry.
The isoelectric focusing (IEF) was performed without ampholytes and glycerol according to the manufacturer's instructions for peptide focusing.
It was established that synthesized ampholytes possess sufficient high sorption and complexing ability in relation to ions of copper, nickel, uranyl both from sour and alkaline solutions.
Although gel-based techniques for protein separation are tremendously powerful, the observation of protein bands reflects a complex set of interactions between protein, ampholytes, buffer composition, gel composition, and pore size.
5M Urea, 4% NP-40, 5% (v/v) 2-mercaptoethanol, 2% v/v ampholytes of pH 5-8 and pH 3-10.
The isoelectric focusing of proteins can be determined using immobilized pH gradients or ampholytes.
Ampholytes were removed by bringing each fraction to 1 M NaCl for 15 min and then aliquots of 10-20 [micro]L of each fraction were used for protein analysis.
5:1, 9 M urea, 2% ampholytes (pH range 3-10), and 1% Triton X-100.