RT Book, Section A1 Goodman, Stephen I. A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 6725328 T1 Chapter 140. Disorders of Metabolism of Lysine, Hydroxylysine, and Related Compounds T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=6725328 RD 2023/03/28 AB Deficiency of the bifunctional protein alpha-aminoadipic semialdehyde synthase causes familial hyperlysinemia. The clinical significance of this enzyme deficiency is controversial. Psychomotor retardation has been reported in many, but not all, affected individuals.