Ready-to-use ELISA kits are available for the detection of Histidine ammonia lyase, an alias of the protein, histidine ammonia-lyase. The official gene symbol is HAL. The protein has a mass of 72.7 kDa and length of 657 residues. It is a member of the PAL/histidase family and may be known by other names, including: HSTD, HIS, and histidase.