prsm_data =
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                ],
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                    "ptm_type": "Fixed",
                    "ptm": {
                        "abbreviation": "Carbamidomethylation",
                        "unimod": "-1",
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                    "occurence": {
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                        "right_pos": "5",
                        "anno": "C"
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                }
            }
        }
    }
}
