| For ubiquitin, the only one of the four proteins with a net positive charge at pH 7, the interaction of the dipole moment with the average electric field dominates. |
| The protein is linked to a second protein, ubiquitin, when the cell detects that DNA damage has occurred. |
| With this capability, the ubiquitin system protects against breast cancer development. |
| Like other such molecules, it tags specific proteins for degradation by attaching a small protein marker called ubiquitin to them. |
| The scientists will now focus on better understanding the precise mechanism by which ubiquitin and the proteasome regulate viral budding and maturation. |
| Comparison of simulations of the unfolding processes of protein L and ubiquitin suggests that these proteins unfold by a similar structural mechanism. |
