Is predicted to encode a protein with the following domains: Chromo/chromo shadow domain; Chromo domain; Chromo (CHRromatin Organisation MOdifier) domain; and Chromo-like domain superfamily. Is an ortholog of C. elegans cec-4 and cec-5. In C. elegans, cec-4 is involved in chromosome attachment to the nuclear envelope; regulation of cell differentiation; and regulation of gene expression.