NSUN5 and Intellectual disability: We observed that intellectual disability (ID), also known as mental retardation, was an enriched term for co-regulated proteins for several of the m6A and m5C methylation effector proteins, namely, METTL16, WTAP, RBM15, YTHDC1, YTHDF1, YTHDF2, ALKBH5, NSUN1, NSUN2, NSUN4, NSUN5 and YBX1.