| Hint | Type of reaction | More hint |
| Addition of sugars | |
| Kinases use ATP for... | |
| Crucial in collagen biosynthesis | |
| Happens between two cysteines | |
| It's an N-terminus modification | |
| Performed by Histone Acetyl Transferase | |
| Turns asparagine to aspartic acid | |
| | Hint | Type of reaction | More hint |
| Common in histone's lysine tails | |
| Cyclises the peptide chain | |
| Sends the protein to a degradation pathway | |
| Adds a protein called 'Small Ubiquitin-like Modifier' | |
| Adds iodine | |
| Some proteins are activated by this type of cleavage | |
| Sends the protein to the exterior leaflet of the cell membrane by binding to inositol | |
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