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Table 1 Proteins detected in fresh chicken and quail eggs in comparison to museum stored quail eggs of unknown age.

From: Can museum egg specimens be used for proteomic analyses?

  Chicken Fresh Quail Museum Quail
Protein Present No. Pept. Mascot % Cov. Present No. Pept. Mascot % Cov. Present No. Pept. Mascot % Cov.
Clusterin 7 201 23 5 145 12 1 39 1
Cystatin 5 175 39 5 134 31 * 1 40 9
Lysozyme 12 227 80 11 315 75 5 5 34
Osteopontin 1 59 5 2 48 5 2 61 5
Ovalbumin 17 1997 78 17 1053 42 9 378 20
Ovocalyxin-32 3 61 44 2 129 4 - - -
Ovocleidin-17 7 434 54 2 82 33 * 2 85 11
Ovocleidin-116 24 2017 44 18 1214 42 5 308 12
Ovoinhibitor 3 139 9 3 38 10 - - -
Ovomucoid 3 151 25 14 497 88 7 247 38
Ovotransferrin 24 1036 43 2 64 3 - - -
  1. A tick mark () denotes presence and a cross (✗) absence. Number of unique peptides is abbreviated to "No. Pept.". Mascot refers to the Mascot score. Further information on peptide sequences is located in Additional File 2. The asterix (*) refers to proteins that were detected only through the urea extraction technique.