Ready-to-use ELISA kits are available for the detection of H4/p, an alias of the protein, inter-alpha-trypsin inhibitor heavy chain 4. The official gene symbol is ITIH4. The kits can detect several species variants of the protein, including: human, mouse, rat, and other mammalian. The protein, with a mass of 103.4 kDa and length of 930 residues, is reported to be secreted. It is a member of the ITIH family and may be known by other names, including: inter-alpha-trypsin inhibitor heavy chain-like 1, inter-alpha-trypsin inhibitor heavy chain family member 4, inter-alpha-inhibitor heavy chain 4, ITI heavy chain H4, and inter-alpha-trypsin inhibitor heavy chain H4, and GP120.