Ready-to-use ELISA kits are available for the detection of HSP110, an alias of the protein, heat shock protein family A (Hsp70) member 4. The official gene symbol is HSPA4. The kits can detect several species variants of the protein, including: human, mouse, rat, bovine, primate, guinea pig, and other mammalian. The protein, with a mass of 94.3 kDa and length of 840 residues, is reported to be cytoplasmic. It is a member of the Heat shock protein 70 family and may be known by other names, including: hsp70 RY, heat shock protein 110 kDa, heat shock 70kD protein 4, heat shock 70-related protein APG-2, epididymis secretory sperm binding protein Li 5a, and heat shock 70 kDa protein 4, and HEL-S-5a.