Enables cystathionine beta-lyase activity. Involved in several processes, including alpha-amino acid metabolic process; glutathione metabolic process; and negative regulation of cell growth. Predicted to be located in cytosol. Predicted to be active in cytoplasm. Used to study cataract. Human ortholog(s) of this gene implicated in amino acid metabolic disorder and cystathioninuria. Orthologous to human CTH (cystathionine gamma-lyase). [provided by Alliance of Genome Resources, Apr 2022]