This family consists of several bacterial L-asparaginase II proteins. L-asparaginase (EC:3.5.1.1) catalyzes the hydrolysis of L-asparagine to L-aspartate and ammonium. Rhizobium etli possesses two asparaginases: asparaginase I, which is thermostable and constitutive, and asparaginase II, which is thermolabile, induced by asparagine and repressed by the carbon source.