title: Variable and constant parts of the immunoglobulin light chain gene of a mouse myeloma cell are 1250 nontranslated bases apart.
abstract: A DNA fragment carrying an immunoglobulin gene coding for both variable (V) and constant (C) regions of a mouse lambda light chain was enriched about 15-fold from a total endonuclease EcoRI digest of a plasmacytoma (HOPC 2020) DNA by preparative agarose gel electrophoresis. The DNA fraction was used for cloning of a lambda chain gene in the phage lambdagtWES vector. After screening [Benton, W. D. & Davis, R. W. (1977) Science 196, 180-182] of about 70,000 plaques, each arising from an independent transfection event, we isolated one clone (Ig 303) that contained both a Vlambda and a Clambda DNA sequence. Electron microscopy of R-loops formed between the cloned DNA and purified lambda chain mRNA (HOPC 2020) revealed that the Vlambda and Clambda DNA sequences are separated by a 1250-base DNA fragment.
mesh_terms: D000818:Animals; D001483:Base Sequence; D001666:Binding Sites, Antibody; D004273:DNA, Neoplasm / Q000235:genetics; D005796:Genes; D007147:Immunoglobulin Light Chains / Q000235:genetics*; D007135:Immunoglobulin Variable Region; D007146:Immunoglobulin lambda-Chains / Q000235:genetics*; D051379:Mice; D009194:Myeloma Proteins / Q000235:genetics*; D009374:Neoplasms, Experimental / Q000235:genetics; D009693:Nucleic Acid Hybridization; D010954:Plasmacytoma / Q000235:genetics; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000235:genetics
chemical_list: D004273:DNA, Neoplasm; D007147:Immunoglobulin Light Chains; D007135:Immunoglobulin Variable Region; D007146:Immunoglobulin lambda-Chains; D009194:Myeloma Proteins; D012333:RNA, Messenger