Enables chromatin binding activity. Involved in several processes, including maternal behavior; positive regulation of chromatin binding activity; and regulation of nucleobase-containing compound metabolic process. Located in chromatin. Used to study choline deficiency disease. Biomarker of choline deficiency disease; transient cerebral ischemia; and visual epilepsy. Human ortholog(s) of this gene implicated in schizophrenia. Orthologous to human MBD2 (methyl-CpG binding domain protein 2). [provided by Alliance of Genome Resources, Apr 2022]