Fig. 2. A fingerprint region in a ¹⁵N-¹H HSQC spectrum of the N-terminal region of HPV16 E7 oncoprotein (N-E7) obtained at 10℃ and pH 6.5 on 90% H2O/10% D₂O. The backbone ¹⁵N and amide of 43 residues out of 46 residues were assigned (3 proline residues without amide NH are not visible in this spectrum).