sentence: In this work , experimentally verified phosphorylated and O-GlcNAcylated sites on Ser and Thr were derived from several major databases , including Phospho.ELM [ 17 ] ( version 9.0 ) , PhosphoSitePlus [ 18 ] ( version 2014_11 ) , dbOGAP [ 19 ] ( version 1.0 ) , and dbPTM [ 20 ] ( version 3.0 ) .