Ready-to-use ELISA kits are available for the detection of 4F2HC, an alias of the protein, solute carrier family 3 member 2. The official gene symbol is SLC3A2. The protein, with a mass of 68 kDa and length of 630 residues, is reported to be membrane-associated. It is a member of the SLC3A transporter family and may be known by other names, including: solute carrier family 3 (activators of dibasic and neutral amino acid transport) member 2, monoclonal antibody 44D7, antigen identified by monoclonal antibodies 4F2 TRA1.10 TROP4 and T43, CD98 heavy chain, and 4F2 cell-surface antigen heavy chain, and 4F2.