Posttranscriptional regulator of phosphate metabolism%3B facilitates PHO4 mRNA degradation by interacting with Pop2p%3B regulates PHO4 mRNA stability by binding to PHO4's 3'UTR in a phosphate-dependent manner%3B contains highly conserved YTH (YT521-B Homology) domain that exhibits RNA-binding activity%3B human homolog YTHDF2 can complement yeast null mutant