[
 {
  "observation_id": 1172,
  "peptide": "LLVVYPWTQR",
  "proforma": "LLVVYPWTQR",
  "protein_accession": "P69892",
  "protein_name": "Hemoglobin subunit gamma-2",
  "measured_mz": 1274.8811,
  "charge": 1,
  "adduct": "H",
  "theoretical_mz": 1274.72557,
  "ppm_error": 122.01,
  "species": "Homo sapiens",
  "taxon_id": 9606,
  "tissue": "Breast",
  "uberon_id": "UBERON:0000310",
  "condition": "Breast tumour",
  "doi": "10.1021/pr3003672",
  "status": "approved",
  "flags": "reported_theoretical_differs"
 },
 {
  "observation_id": 1272,
  "peptide": "WLQGSQELPR",
  "proforma": "WLQGSQELPR",
  "protein_accession": "P01877",
  "protein_name": "Immunoglobulin heavy constant alpha 2",
  "measured_mz": 1213.7753,
  "charge": 1,
  "adduct": "H",
  "theoretical_mz": 1213.6324,
  "ppm_error": 117.75,
  "species": "Homo sapiens",
  "taxon_id": 9606,
  "tissue": "Breast",
  "uberon_id": "UBERON:0000310",
  "condition": "Breast tumour",
  "doi": "10.1021/pr3003672",
  "status": "approved",
  "flags": "reported_theoretical_differs"
 }
]