1 O 15.99940 ; carbonyl oxygen (C=O)
2 OM 15.99940 ; carboxyl oxygen (CO-)
3 OA 15.99940 ; hydroxyl, sugar or ester oxygen
4 OW 15.99940 ; water oxygen
5 N 14.00670 ; peptide nitrogen (N or NH)
6 NT 14.00670 ; terminal nitrogen (NH2)
7 NL 14.00670 ; terminal nitrogen (NH3)
8 NR 14.00670 ; aromatic nitrogen
9 NZ 14.00670 ; Arg NH (NH2)
10 NE 14.00670 ; Arg NE (NH)
11 C 12.01100 ; bare carbon
12 CH1 13.01900 ; aliphatic or sugar CH-group
13 CH2 14.02700 ; aliphatic or sugar CH2-group
14 CH3 15.03500 ; aliphatic CH3-group
15 CH4 16.04300 ; methane
16 CR1 13.01900 ; aromatic CH-group
17 HC 1.00800 ; hydrogen bound to carbon
18 H 1.00800 ; hydrogen not bound to carbon
19 DUM 0.00000 ; dummy atom, no idea what the mass should be. PT3-99
21 CU1+ 63.54600 ; copper (charge 1+)
22 CU2+ 63.54600 ; copper (charge 2+)
23 FE 55.84700 ; iron (heme)
24 ZN2+ 65.37000 ; zinc (charge 2+)
25 MG2+ 24.30500 ; magnesium (charge 2+)
26 CA2+ 40.08000 ; calcium (charge 2+)
29 F 18.99840 ; fluor (non-ionic)
30 CL 35.45300 ; chlorine (non-ionic)
31 BR 79.90400 ; bromine (non-ionic)
32 CMET 15.035 ; CH3-group in methanol (solvent)
33 OMET 15.9994 ; oxygen in methanol (solvent)
34 NA+ 22.9898 ; sodium (charge 1+)
35 CL- 35.45300 ; chlorine (charge 1-)
36 CCHL 12.011 ; carbon in chloroform (solvent)
37 CLCHL 35.453 ; chloride in chloroform (solvent)
38 HCHL 1.008 ; hydrogen in chloroform (solvent)
39 SDMSO 32.06000 ; DMSO Sulphur (solvent)
40 CDMSO 15.03500 ; DMSO Carbon (solvent)
41 ODMSO 15.99940 ; DMSO Oxygen (solvent)
42 CCL4 12.011 ; carbon in carbontetrachloride (solvent)
43 CLCL4 35.453 ; chloride in carbontetrachloride (solvent)
45 MNH3 0 ; Dummy mass in rigid tetraedrical NH3 group
46 MW 0 ; Dummy mass in rigid tyrosine rings
47 IW 0 ; Dummy particle in TIP4P etc.
48 OWT3 15.99940 ; TIP3P WATER OXYGEN
49 OWT4 15.99940 ; TIP4P WATER OXYGEN