Relative expression levels across adult mouse brain (frontal and cerebral cortex, substantia nigra, cerebellu, amygdale, hypothalamus, hippocampus) and relatively mesenchyme-rich tissues (bone, white fat, brown fat, trachea, digits, lung, bladder, uterus, umbilical cord) are shown for genes with bivalent chromatin marks in ES cells that retain H3K4me3 in NPCs but lose this mark in MEFs (n=62) or vice versa (n=160). Red, white and blue indicates higher, equal and lower relative expression, respectively.