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23andMe is a privately held personal genomics and biotechnology company based in Mountain View, California. The company is named for the 23 pairs of chromosomes in a normal human cell.ustomers provide a saliva testing sample that is partially SNP genotyped and results are posted online. In 2008, when the company was offering estimates of predisposition for more than 90 traits and conditions ranging from baldness to blindness, Time magazine named the product Invention of the Year.
CD22, or cluster of differentiation -22, is a molecule belonging to the SIGLEC family of lectins.It is found on the surface of mature B cells and to a lesser extent on some immature B cells.Generally speaking, CD22 is a regulatory molecule that prevents the overactivation of the immune system and the development of autoimmune diseases.he presence of Ig domains makes CD22 a member of the immunoglobulin superfamily. CD22 functions as an inhibitory receptor for B cell receptor (BCR) signaling. It is also involved in the B cell trafficking to Peyer's patches in mice.