About CTLA-4
This gene is a member of the immunoglobulin superfamily and encodes a protein which transmits an inhibitory signal to T cells. The protein contains a V domain, a transmembrane domain, and a cytoplasmic tail. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. The membrane-bound isoform functions as a homodimer interconnected by a disulfide bond, while the soluble isoform functions as a monomer. Mutations in this gene have been associated with insulin-dependent diabetes mellitus, Graves disease, Hashimoto thyroiditis, celiac disease, systemic lupus erythematosus, thyroid-associated orbitopathy, and other autoimmune diseases. [provided by RefSeq, Jul 2008]

About Alexa Fluor 532
Alexa Fluor™ 532 (AF532, Alexa 532) has an excitation peak at 532 nm and an emission peak at 554 nm, and is spectrally similar to Cy®3 (GE Healthcare), TRITC, iFluor® 514 (ATT Bioquest) and iFluor® 546 (ATT Bioquest). Many flow cytometers are equipped with 532nm lasers, so while Alexa 532 can be used for flow cytometry, PE is more commonly used due to its brightness and spectral characteristics. This dye is commonly used for fluorescence microscopy applications.