PMID- 10528804 OWN - NLM STAT- MEDLINE DCOM- 19991207 LR - 20190826 IS - 0165-2478 (Print) IS - 0165-2478 (Linking) VI - 69 IP - 3 DP - 1999 Sep 1 TI - The human immunoglobulin variable lambda locus IGLV9 gene is a monomorphic marker in the urban Brazilian population. PG - 369-70 AB - The physical map of the human immunoglobulin variable lambda locus (IGLV) located on chromosome 22q11.1-q11.2 shows the existence of 52 functional V-lambda genes distributed among three V-clusters. The IGLV9S1 gene, located in the V-B cluster, is a sequence tagged site and is a useful marker for restriction fragment length polymorphism (RFLP) population studies. The V-lambda genes are associated in the genome with EcoRI fragments detectable in Southern blots of genomic DNA samples. We have analysed DNA samples of an urban Brazilian population by Southern-EcoRI-RFLP using an IGLV9 gene segment. Among 75 unrelated individuals analysed, we detected a single 6.0 kb EcoRI fragment containing the IGLV9 gene at 100% frequency. Reverse transcription followed by polymerase chain reaction (RT-PCR) of peripheral blood leukocyte total RNA from unrelated individuals showed that IGLV9S1 is a functional gene contributing to the B lymphocyte repertoire. These data represent evidence for monomorphism of the IGVL9S1 gene in this urban population. We demonstrate that IGLV9S1 is a functional single copy gene and is an important marker in the IGLV locus. FAU - da Silva, M I AU - da Silva MI AD - Departamento de Genetica, Faculdade de Medicina de Ribeirao Preto, Universidade de Sao Paulo, Brazil. FAU - Passos, G A AU - Passos GA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Immunol Lett JT - Immunology letters JID - 7910006 RN - 0 (Biomarkers) RN - 0 (Immunoglobulin Variable Region) RN - 0 (Immunoglobulin lambda-Chains) SB - IM MH - Biomarkers MH - Brazil MH - Chromosomes, Human, Pair 22 MH - Genes, Immunoglobulin MH - Humans MH - Immunoglobulin Variable Region/*genetics MH - Immunoglobulin lambda-Chains/*genetics MH - Polymorphism, Restriction Fragment Length EDAT- 1999/10/21 00:00 MHDA- 1999/10/21 00:01 CRDT- 1999/10/21 00:00 PHST- 1999/10/21 00:00 [pubmed] PHST- 1999/10/21 00:01 [medline] PHST- 1999/10/21 00:00 [entrez] AID - S0165247899001091 [pii] AID - 10.1016/s0165-2478(99)00109-1 [doi] PST - ppublish SO - Immunol Lett. 1999 Sep 1;69(3):369-70. doi: 10.1016/s0165-2478(99)00109-1.