Largest subunit (p90) of the Chromatin Assembly Complex (CAF-1); chromatin assembly by CAF-1 is important for multiple processes including histone H3/H4 tetramerization, silencing at telomeres, mating type loci and rDNA, maintenance of kinetochore structure, deactivation of  DNA damage checkpoint after DNA repair, chromatin dynamics during transcription, and repression of divergent noncoding transcription