Involved in the reprogramming of X-chromosome inactivation during the acquisition of pluripotency. Required for efficient elongation of TSIX, a non-coding RNA antisense to XIST. Binds DXPas34 enhancer within the TSIX promoter. Involved in ES cell self-renewal (By similarity). . This is the function of Ensembl gene identifier ENSG00000179059 (ZFP42, ZFP42 zinc finger protein).