CD222 is a 250kDa transmembrane protein with a short cytoplasmic tail containing an internalization signal. CD222 was originally identified as a receptor for IGFII and M6P-containing proteins (e.g. lysosomal hydrolases). Lysosomal enzymes are sorted to lysosomes via CD222 either from the Golgi, where the enzymes acquire M6P, or from the extracellular space. The majority of CD222 molecules (approximately 90-95%) are located intracellularly, only 5-10% is present on the cell membrane. The internalization rate seems to be enhanced by ligand induced dimerization of CD222 as well as by phosphorylation of its cytoplasmic serine. CD222 is also a receptor for TGFbeta latency associated peptide (LAP), proliferin and may bind several molecules independently of M6P, including plasminogen, CD87 or retinoic acid. It is involved in activation of latent TGFbeta [PROW].
Our Abpromise guarantee covers the use of ab8093 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|Flow Cyt||Use 1µg for 106 cells. ab170190-Mouse monoclonal IgG1, is suitable for use as an isotype control with this antibody.|
|IP||Use a concentration of 10 µg/ml.|
|WB||Use at an assay dependent concentration. Use under non reducing condition.|
|ICC/IF||Use at an assay dependent concentration. Used at a concentration of 5 ug/ml for 1 hr on HEK cells (see Abreview for further information).|
ab8093 at 5µg/ml staining human HEK cells by immunocytochemistry. The cells were fixed with paraformaldehyde and incubated with the antibody for 1 hour. Bound antibody was detected using a goat anti-mouse IgG Alexa-Fluor ® 568. In the confocal image ab8093 labelling in red shows a distribution consistent with the location of the trans-Golgi network and lysosomes. Blue nuclear counterstain is present.
This image is courtesy of an Abreview submitted by Randal Moldrich on 31 March 2006.