Looking at the somewhat distressed Wang Qiang, Lin Li stepped forward and patted his beloved disciple's shoulder.
Then he took the mass spectrum from her hand and studied it carefully.
For mass spectrum, once the positions of peptide chain fragmentation are determined, finding the substances or similar intervals becomes relatively simple.
Because peptide chains are polar, except for a few cyclic ones, other peptide chains have asymmetric ends:
The end with a free α-amino group is called the amino end or N-terminal, and the end with a free α-carboxyl group is called the carboxyl end or C-terminal.
Among them, N-terminal fragment ions are the B series, and C-terminal fragment ions are the Y series.
Then you can back calculate in this direction.
Even if this substance doesn't have related records in the database, back calculating its composition isn't difficult, unless it's absurdly composed of dark matter.
