Résumé : The lentil lectin extracted from Lens culinaris seeds crystallizes in the orthorhombic space group P212121 with unit cell dimensions a=50·1 Å, b=67·8 Å and c=130·2 Å. The asymmetric unit contains one, protein molecule. The crystals are suitable for high resolution work. © 1983 Academic Press Inc. (London) Ltd.