You can provide a simple 4 column file: The first column should be the residue number,
the second, the residue name (three-letter code), the third column the 13Cα experimental
chemical shifts and the fourth column the 13Cβ chemical shifts.
    Spaces should be used to separates the columns. Missing values should be indicated with
the "999.00" value.


1 MET 55.63 32.95
2 TYR 62.81 39.27
3 ALA 53.78 18.97
4 GLY 47.24 999.00
5 LYS 57.55 32.77
6 ILE 56.38 38.59