[
 {
  "observation_id": 756,
  "peptide": "AVFVDLEPTVIDEVR",
  "proforma": "AVFVDLEPTVIDEVR",
  "protein_accession": "P68370",
  "protein_name": "Tubulin alpha-1A chain",
  "measured_mz": 1701.92,
  "charge": 1,
  "adduct": "H",
  "theoretical_mz": 1701.90578,
  "ppm_error": 8.36,
  "species": "Rattus norvegicus",
  "taxon_id": 10116,
  "tissue": "Brain",
  "uberon_id": "UBERON:0000955",
  "condition": "",
  "doi": "10.1021/ac901043n",
  "status": "approved",
  "flags": ""
 },
 {
  "observation_id": 852,
  "peptide": "HGFLPR",
  "proforma": "HGFLPR",
  "protein_accession": "P02688",
  "protein_name": "Myelin basic protein",
  "measured_mz": 726.23,
  "charge": 1,
  "adduct": "H",
  "theoretical_mz": 726.40457,
  "ppm_error": -240.32,
  "species": "Rattus norvegicus",
  "taxon_id": 10116,
  "tissue": "Brain",
  "uberon_id": "UBERON:0000955",
  "condition": "",
  "doi": "10.1021/ac901043n",
  "status": "approved",
  "flags": ""
 },
 {
  "observation_id": 860,
  "peptide": "HRDTGILDSIGR",
  "proforma": "HRDTGILDSIGR",
  "protein_accession": "P02688",
  "protein_name": "Myelin basic protein",
  "measured_mz": 1339.24,
  "charge": 1,
  "adduct": "H",
  "theoretical_mz": 1339.70769,
  "ppm_error": -349.1,
  "species": "Rattus norvegicus",
  "taxon_id": 10116,
  "tissue": "Brain",
  "uberon_id": "UBERON:0000955",
  "condition": "",
  "doi": "10.1021/ac901043n",
  "status": "approved",
  "flags": ""
 },
 {
  "observation_id": 1190,
  "peptide": "RPSQR",
  "proforma": "RPSQR",
  "protein_accession": "P02688",
  "protein_name": "Myelin basic protein",
  "measured_mz": 643.35,
  "charge": 1,
  "adduct": "H",
  "theoretical_mz": 643.36343,
  "ppm_error": -20.88,
  "species": "Rattus norvegicus",
  "taxon_id": 10116,
  "tissue": "Brain",
  "uberon_id": "UBERON:0000955",
  "condition": "",
  "doi": "10.1021/ac901043n",
  "status": "approved",
  "flags": ""
 }
]