Hi, everyone!
I have been trying to do a sequential assignment of the protein I am working with, but right now I am struggling with the “cross-peak <=> amminoacid” predicted/prediction assignment .
I am using an hsqc-tocsy, just to check if the coss-peak i believe is (i.e.) a Serine; really looks like one in my experiment. Fortunatelly, that is indeed what happens, yet for some reason that escapes me, the predicction algorithm resolves that those peaks belong to a Theonine or other AA. In the picture, you can see the Serine reference on the left, the tocsy assigned cross-peaks looking like a serine in the middle, an hsqc reference on the right, and the Sequence Graph at the bottom; predicting the threonine where a serine should be.
So, I am doing something wrong? I can not go any further with the sequencing (I have also an hsqc-noesy for that purpose), if I first can not assign the right AA to the right cross-peak.
Thank you in advance for any tip/aid/guide you can give me, I will really appreciate it.
Best regards!
Fran.