The function of ENSG00000239605 (STPG4, sperm-tail PG-rich repeat containing 4) is as follows. Maternal factor that plays a role in epigenetic chromatin reprogramming during early development of the zygote. Involved in the regulation of gametic DNA demethylation by inducing the conversion of the modified genomic base 5-methylcytosine (5mC) into 5- hydroxymethylcytosine (5hmC). .