DLGAP3 and trichotillomania: In OCD, targeted re-sequencing of the human gene for the postsynaptic synapse-associated protein 90 (SAP90)/postsynaptic density-95 (PSD95)-associated protein 3 (SAPAP3), motivated by an OCD-like phenotype in knockout mice lacking SAPAP3, found an overrepresentation of RNM’s in OCD and/or trichotillomania subjects implicating SAPAP3 in the genetic risk for OCD [10].