Ubiquitin
Seventy-six residues of fold-and-signaling perfection. The reference β-grasp fold and a staple of folding studies.
Ubiquitin is a 76-residue regulatory protein covalently attached to substrate proteins to mark them for degradation, trafficking, or other fates. Its β-grasp fold is one of the most studied in protein biophysics.
Seventy-six residues of fold-and-signaling perfection. The reference β-grasp fold and a staple of folding studies.