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Identifies and delimits the variable (V), diversity (D) and joining (J) genes and alleles within immunoglobulin (Ig) or T-cell receptor (TR) nucleotide rearranged sequences. IMGT/V-QUEST delimits framework and complementarity determining regions. It then displays a graphical 2D representation of the variable region. It can also interact with additional IMGT tools for more detailed analysis via an option on the Search page for a detailed analysis, and via a link on the result page for the phylogenetic analysis of the variable region of input sequence.

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IMGT/V-QUEST classification

IMGT/V-QUEST specifications

Software type:
Restrictions to use:
Input format:
Web user interface
Input data:
Nucleotide sequence(s)
Computer skills:

IMGT/V-QUEST support


  • Véronique Giudicelli <>
  • Marie-Paule Lefranc <>
  • Sofia Kossida <>


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IMGT, the international ImMunoGeneTics information system, Laboratoire d'ImmunoGénétique Moléculaire LIGM, Université Montpellier 2, Institut de Génétique Humaine IGH, UPR CNRS 1142, Montpellier, France

Funding source(s)

Supported by Centre National de la Recherche Scientifique CNRS, Ministère de l’Enseignement Supérieur et de la Recherche MESR (University Montpellier 2), Région Languedoc-Roussillon (GPTR, GEPETOS), Agence Nationale de la Recherche ANR (ANR-06-BYOS-0005-01), and European Community (ImmunoGrid, FP6-2004-IST-4).

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