Additional file 2: Table S1. Prevelance of formaldehyde crosslinking and glycine quencing variable modifications. Table S2. High and low confidence proteins. Table S3. Identifying characteristics of high and low confidence proteins. Table S4. Unique peptides of identified high and low confidence proteins. Table S5. Potential low confidence proteins. Table S6. Gene ontology enrichment of non-redundant biological processes GO terms. Table S7. Gene ontology enrichment of non-redundant molecular function GO terms. Table S8. Gene ontology enrichment of non-redundant cellular component GO terms. Table S9. Cloning and sequencing primers. Table S10. Plasmids.