Ready-to-use ELISA kits are available for the detection of hydroxylysine kinase 1, an alias of the protein, hydroxylysine kinase. The official gene symbol is HYKK. The protein, with a mass of 41.9 kDa and length of 373 residues, is reported to be cytoplasmic. It is a member of the Aminoglycoside phosphotransferase family and may be known by other names, including: AGPHD1, aminoglycoside phosphotransferase domain-containing protein 1, 5-hydroxylysine kinase, and 5-hydroxy-L-lysine kinase.