ANARCI - Antibody Numbering

Antibody Numbering and Antigen Receptor Classification

Sequence Submission Form
or upload multiple sequences as a fasta file:
Numbering Schemes Information

IMGT: Universal scheme with 128 positions for all receptor types

Kabat: Original numbering for heavy/light chains

Chothia: For IGs only, differs from Kabat at CDRH1

Martin: Enhanced Chothia with improved framework handling

AHo: 149 positions, minimizes insertion codes