Lysosomal acid lipase A, or Lipase A, lysosomal acid, cholesterol esterase, is a human gene encoded by LIPA. It may also be known as: Lysosomal acid lipase/cholesteryl ester hydrolase; Acid cholesteryl ester hydrolase; LAL; Cholesteryl esterase; Lipase A; Wolman disease; CESD. The encoded protein is an enzyme with an amino acid length of 399 and a mass of 45.4 kDa. Lysosomal acid lipase A is a member of the AB hydrolase superfamily, Lipase family. Homologs of this gene exist in other organisms, including: Frog.