Lo studente Galbusera, 

dopo l'esposizione in classe, ha fatto notare l'errore di labeling sulla figura scrivendo all'autore del paper pubblicato su Nature Communications, ed ha in effetti ricevuto la seguente risposta.

Complimenti a Riccardo!!!

Dear Riccardo Galbusera,

It is really nice to hear from you. Regarding your request about the chemical shifts in the Supplementary Fig. 94(c), it should be noted that the titration isotherms shown in this figure is based on Fig. 94(a), not Figure 93, in our experiment, the urea protons were not selected for the titration experiments, and four sets of protons (H1, Ha, H14 and H15) were chosed and numbered in Fig. 94(a).  After carefully checking the figure, we are sorry to discover that the numbering of the protons in Supplementary Fig. 94(c) is wrong.  Actually,  the H1 in 94(c) should be H14 in 94(a), the H2 in 94(c) should be H15 in 94(a), the H3 in 94(c) should be H1 in 94(a), and  the H4 in 94(c) should be Ha in 94(a). 

Again, we are sorry for wrong numbering that mislead you, if you have addition question regarding this issue, just let me know.

Best regards! 

Lin