Histone acetylation/deacetylation enzymes: HDAC 1, 2, 3, 7 and 9 found in SSC database of ASD gene mutations.HDAC 1, 2, 4 and 6 involved in fetal microglial memory of LPS exposure; HDAC 1, 2, 4 and 7 increased with altered neuronal AChE signaling and increased anxiety behavior due to adult chronic stress exposure [3,4,25,27,44,45]. This evidence concerns the gene ACHE and Anxiety.