diff --git a/winnow/configs/residues.yaml b/winnow/configs/residues.yaml
index 415f6f1..25cad98 100644
--- a/winnow/configs/residues.yaml
+++ b/winnow/configs/residues.yaml
@@ -24,21 +24,122 @@ residue_masses:
   "R": 156.101111
   "Y": 163.063329
   "W": 186.079313
+  "U": 150.953633
+  "O": 237.147727
   # Modifications
-  "M[UNIMOD:35]": 147.035400 # Oxidation
+  "K[UNIMOD:1]": 170.105528
+  "K[UNIMOD:3]": 354.172561
   "C[UNIMOD:4]": 160.030649 # Carboxyamidomethylation
-  "N[UNIMOD:7]": 115.026943 # Deamidation
   "Q[UNIMOD:7]": 129.042594 # Deamidation
   "R[UNIMOD:7]": 157.085127 # Arginine citrullination
-  "P[UNIMOD:35]": 113.047679 # Proline hydroxylation
+  "N[UNIMOD:7]": 115.026943 # Deamidation
   "S[UNIMOD:21]": 166.998028 # Phosphorylation + 79.966
   "T[UNIMOD:21]": 181.01367 # Phosphorylation + 79.966
   "Y[UNIMOD:21]": 243.029329 # Phosphorylation + 79.966
-  "C[UNIMOD:312]": 222.013284  # Cysteinylation
-  "E[UNIMOD:27]": 111.032028  # Glu -> pyro-Glu
-  "Q[UNIMOD:28]": 111.032029  # Gln -> pyro-Gln
+  "E[UNIMOD:27]": 111.032028 # Glu -> pyro-Glu
+  "Q[UNIMOD:28]": 111.032029 # Gln -> pyro-Gln
+  "K[UNIMOD:34]": 142.110613
+  "R[UNIMOD:34]": 170.116761
+  "M[UNIMOD:35]": 147.035400 # Oxidation
+  "P[UNIMOD:35]": 113.047679 # Proline hydroxylation
+  "K[UNIMOD:36]": 156.126263
+  "R[UNIMOD:36]": 184.132411
+  "K[UNIMOD:37]": 170.141913
+  "N[UNIMOD:43]": 317.122300
+  "K[UNIMOD:58]": 184.121178
+  "K[UNIMOD:64]": 228.111007
+  "K[UNIMOD:121]": 242.137890
+  "K[UNIMOD:122]": 156.089878
+  "N[UNIMOD:137]": 1330.465790
+  "N[UNIMOD:148]": 682.254496
+  "N[UNIMOD:159]": 1006.360143
+  "R[UNIMOD:188]": 162.121240
+  "K[UNIMOD:214]": 272.197026
+  "K[UNIMOD:259]": 136.109162
+  "R[UNIMOD:267]": 166.109380
+  "Y[UNIMOD:275]": 192.053493
+  "N[UNIMOD:305]": 1558.576797
+  "N[UNIMOD:307]": 1720.629620
+  "N[UNIMOD:308]": 1882.682444
+  "N[UNIMOD:309]": 1412.518888
+  "N[UNIMOD:310]": 1574.571711
+  "N[UNIMOD:311]": 1736.624535
+  "C[UNIMOD:312]": 222.013284 # Cysteinylation
+  "K[UNIMOD:481]": 132.120070
+  "K[UNIMOD:737]": 357.257895
+  "S[UNIMOD:737]": 316.194960
+  "K[UNIMOD:747]": 214.095357
+  "K[UNIMOD:1289]": 198.136828
+  "K[UNIMOD:1363]": 196.121178
+  "N[UNIMOD:1408]": 2318.815368
+  "N[UNIMOD:1409]": 2027.719952
+  "N[UNIMOD:1410]": 2173.777860
+  "N[UNIMOD:1452]": 1168.412966
+  "N[UNIMOD:1462]": 1476.523699
+  "N[UNIMOD:1465]": 1492.518613
+  "N[UNIMOD:1467]": 1517.550248
+  "N[UNIMOD:1468]": 1533.545162
+  "N[UNIMOD:1477]": 1638.576522
+  "N[UNIMOD:1480]": 1654.571437
+  "N[UNIMOD:1481]": 1663.608157
+  "N[UNIMOD:1484]": 1679.603071
+  "N[UNIMOD:1487]": 1695.597986
+  "N[UNIMOD:1488]": 1703.614305
+  "N[UNIMOD:1496]": 1777.651084
+  "N[UNIMOD:1500]": 1800.629346
+  "N[UNIMOD:1504]": 1816.624260
+  "N[UNIMOD:1506]": 1824.640579
+  "N[UNIMOD:1509]": 1841.655895
+  "N[UNIMOD:1510]": 1849.672213
+  "N[UNIMOD:1511]": 1850.692615
+  "N[UNIMOD:1519]": 1923.708993
+  "N[UNIMOD:1529]": 1970.698488
+  "N[UNIMOD:1531]": 1978.677084
+  "N[UNIMOD:1532]": 1980.730457
+  "N[UNIMOD:1534]": 1986.693402
+  "N[UNIMOD:1537]": 2003.708718
+  "N[UNIMOD:1540]": 2021.757006
+  "N[UNIMOD:1541]": 2028.740353
+  "N[UNIMOD:1547]": 2044.735267
+  "N[UNIMOD:1549]": 2060.730182
+  "N[UNIMOD:1551]": 2068.746501
+  "N[UNIMOD:1555]": 2085.761816
+  "N[UNIMOD:1559]": 2101.756731
+  "N[UNIMOD:1562]": 2110.793451
+  "N[UNIMOD:1722]": 1647.613242
+  "N[UNIMOD:1746]": 1907.714078
+  "N[UNIMOD:1761]": 1152.418052
+  "N[UNIMOD:1763]": 1209.439515
+  "N[UNIMOD:1766]": 1314.470875
+  "N[UNIMOD:1768]": 1355.497424
+  "N[UNIMOD:1769]": 1371.492339
+  "N[UNIMOD:1771]": 1501.555333
+  "N[UNIMOD:1772]": 1615.598261
+  "N[UNIMOD:1773]": 1662.587755
+  "N[UNIMOD:1775]": 1761.656169
+  "N[UNIMOD:1776]": 1818.677633
+  "N[UNIMOD:1777]": 1865.667128
+  "N[UNIMOD:1778]": 1866.687529
+  "N[UNIMOD:1779]": 1898.677358
+  "N[UNIMOD:1780]": 1939.703908
+  "N[UNIMOD:1781]": 1964.735542
+  "N[UNIMOD:1782]": 2011.725037
+  "N[UNIMOD:1783]": 2012.745438
+  "N[UNIMOD:1784]": 2052.751586
+  "N[UNIMOD:1785]": 2069.766902
+  "N[UNIMOD:1840]": 2206.788091
+  "K[UNIMOD:1848]": 242.126657
+  "K[UNIMOD:1849]": 214.131742
+  "N[UNIMOD:1963]": 1962.682169
+  "N[UNIMOD:1964]": 1994.709721
+  "K[UNIMOD:2016]": 432.302109
+  "N[UNIMOD:2028]": 2975.042981
+  "N[UNIMOD:2029]": 2466.888927
   # Terminal modifications
   "[UNIMOD:1]": 42.010565 # Acetylation
   "[UNIMOD:5]": 43.005814 # Carbamylation
+  "[UNIMOD:214]": 144.102063
   "[UNIMOD:385]": -17.026549 # NH3 loss
+  "[UNIMOD:737]": 229.162932
+  "[UNIMOD:2016]": 304.207146
   "(+25.98)": 25.980265  # Carbamylation & NH3 loss (legacy notation)