{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"CD74, also known as the MHC Class II-associated invariant chain (II), is a Type II transmembrane protein which binds to the peptide-binding groove of newly-synthesized MHC class II alpha/beta heterodimers and prevents their premature association with endogenous polypeptides. CD74 is expressed primarily by antigen-presenting cells such as B-lymphocytes (from before the pre-B-cell stage to before the plasma-cell stage), macrophages and monocytes, together with many epithelial cells.CD74 stains predominantly germinal-center lymphocytes and B-cell lymphomas but rarely T-cell lymphomas. It stains the cell membrane but a perinuclear globular labeling is also noted. CD74 is useful in differentiating Atypical Fibroxanthoma from Malignant Fibrous Histiocytoma, as well as Small-cell Lung Carcinoma from Non-small cell Lung Carcinomas."}]},{"type":"paragraph","children":[{"type":"text","value":"Presentation\nFive slides of CD74 positive tissues, each mounted on Hydrophilic Plus Slides, provided in a plastic mailer."}]},{"type":"paragraph","children":[{"type":"text","value":"Catalog No.\nQuantity\nBSB-9109-CS\n5 slides\nBSB 5301\n5 slides"}]},{"type":"paragraph","children":[{"type":"text","value":"Storage Store at 20-25°C"}]},{"type":"paragraph","children":[{"type":"text","value":"Precautions\n1. For professional users only. Results should be interpreted by a qualified medical professional.\n2. Ensure proper handling"}]}]}