Functional GFP fusions to the ERMES proteins Mdm12, Mdm34, and Mmm1 encoded at their endogenous chromosomal loci were purified from yeast cell lysates with GFP antibodies. Purified proteins were identified by tandem mass spectrometry with a <1% decoy false discovery rate. As a control, mock purifications were performed from an isogenic strain background that did not express GFP. The average total spectrum counts assigned to each protein from two IPs for Mdm12 and Mmm1 and four IPs for Mdm34 are tabulated. We included in this table proteins that met the following criteria: (a) they were identified in duplicate sample experiments for Mdm12/Mmm1 or 3/4 IPs for Mdm34, and (b) their average spectral counts were at least 10-fold higher than in mock purifications. Tabulated are proteins that were identified in duplicate sample experiments and whose average spectral counts were at least 10-fold higher than in mock purifications. The “CRAPome” score for identified proteins is listed at right and is a measure of how likely the identified protein is the result of a nonspecific interaction. This number is derived from the Contaminant Repository for Affinity Purifications database, CRAPome, and is the proportion of mock purifications in which the protein is identified.