The proteomics BAM (proBAM) file format is designed for storing and analyzing peptide spectrum matches (PSMs) within the context of the genome. proBAM is built upon the SAM format and its compressed binary version, BAM, with necessary modifications to accommodate information specific to proteomics data such as PSM scores and confidence, charge states and peptide level modifications, both artefactual and PTMs (post-translational modifications).
genome peptide post-translational protein modification spectrum