| Code | Name | ID | MW | PDB ID | Crystallographer | Purification |
|---|---|---|---|---|---|---|
| ZN | zinc | IDP02710 | 34,742.46 kDa | 3LU2 | Spencer Anderson | Olena Onopriyenko (UT) |
| ZN | zinc | IDP92047 | 24,529.87 kDa | 4NU7 | George Minasov | Kristin Flores (NU) |
| ZN | zinc | IDP98393 | 39,352.65 kDa | 7RGN | Peter Stogios | Elena Evdokimova (UT) |
| ZN | zinc | IDP95570 | 24,915.95 kDa | 5UB8 | Peter Stogios | Tatiana Skarina (UT) |
| ZN | zinc | IDP01964 | 17,187.45 kDa | 3KWO | Youngchang Kim | Minyi Gu (ANL) |
| ZN | zinc | IDP52003 | 35,615.41 kDa | 7SGW | Jerzy Osipiuk | Christine Tesar (ANL) |
| X77 | X77 | IDP52005 | 34,279.33 kDa | 6W63 | Brandon Anson | Brandon Anson (PU) |
| UD1 | uridine-diphosphate-n-acetylglucosamine | IDP01463 | 44,671.50 kDa | 4R7U | Boguslaw Nocek | Natalia Maltseva (ANL) |
| EPU | uridine-diphosphate-2(n-acetylglucosaminyl) butyric aci d | IDP07236 | 45,852.88 kDa | 5WI5 | George Minasov | Olga Kiryukhina (NU) |
| EPU | uridine-diphosphate-2(n-acetylglucosaminyl) butyric aci d | IDP07215 | 44,958.09 kDa | 6CN1 | George Minasov | Albin Cardona-Correa (NU) |
| U5P | uridine-5'-monophosphate | IDP52015 | 38,797.34 kDa | 6WLC | Youngchang Kim | Robert Jedrzejczak (ANL) |
| U5P | uridine-5'-monophosphate | IDP90525 | 24,986.32 kDa | 3UWQ | Andrei Halavaty | James Winsor (NU) |
| UVC | uridine-2',3'-vanadate | IDP52015 | 38,797.34 kDa | 7K1L | Youngchang Kim | Robert Jedrzejczak (ANL) |
| URI | uridine | IDP04297 | 31,939.21 kDa | 4EG2 | George Minasov | Tatiana Skarina (UT) |
| URE | urea | IDP07164 | 32,137.72 kDa | 6NFP | George Minasov | Elena Evdokimova (UT) |
| URA | uracil | IDP00044 | 63,625.42 kDa | 3SLF | Maks Chruszcz | Elena Evdokimova (UT) |
| UNX | Unknown atom | IDP00167 | 483,499.45 kDa | 3FZY | Ludmilla Shuvalova | James Winsor (NU) |
| UNX | Unknown atom | IDP90557 | 26,043.81 kDa | 3RSH | Jing Hou | Jing Hou (UVA) |
| UNX | Unknown atom | IDP52003 | 35,615.41 kDa | 7JN2 | Jerzy Osipiuk | Christine Tesar (ANL) |
| UNX | Unknown atom | IDP90557 | 26,043.81 kDa | 3U09 | Jing Hou | Jing Hou (UVA) |