Component of the NuA3b histone acetyltransferase complex; binds to Pol II and stimulates elongation; regulates interaction between NuA3b and H3K36me3 at transcribed regions of genes; contains PWWP domain; protein abundance increases in response to DNA replication stress; relocalizes to the cytosol in response to hypoxia; extensive sequence similarity (~25% identity; ~39% similarity) to the N-terminal region of human NDF