Transferred to 4.3.1.20

erythro-3-hydroxy-L-aspartate ammonia-lyase; erythro-beta-hydroxyaspartate dehydratase; erythro-3-hydroxyaspartate dehydratase; erythro-3-hydroxy-Ls-aspartate hydro-lyase (deaminating); erythro-3-hydroxy-Ls-aspartate ammonia-lyase