Nucleotide sequences of the germ-line 13K20, 13K23, 13K04, 13K07, 13K09, 13K11, 13K12, 13K16, 13K17, and 13K18 Vκ gene segments isolated from PMN of the patients whose B cells were utilized for the generation of the mAb13-producing cell line. The top sequence (13K20, identical to that of the germ-line kv3g gene) is that to which the remaining sequences are compared. Dashes indicate identities. Solid lines on top of each cluster depict CDR. The sequences and reverse complementary sequences encompassed by the H-Ov2 and κIII-FR3 primers, respectively, are underlined. The germ-line 13K20/13K23, 13K04, 13K07/13K09, 13K11/13K12, 13K16/13K17, and 13K18 Vκ gene sequences are available from EMBL/GenBank under accession numbers L-37726, L-37728, L-37727, L-37725, L-37730, and L-37729, respectively.