Two closely related families of aspartate-semialdehyde dehydrogenase are found. They differ by a deep split in phylogenetic and percent identity trees and in gap patterns. This model represents a branch more closely related to the USG-1 protein than to the other aspartate-semialdehyde dehydrogenases represented in model TIGR00978. [Amino acid biosynthesis, Aspartate family]
Jiyao W et al.(2023). "The conserved domain database in 2023.",