[spctools-discuss] How to set Xpress Options in TPP?

2011-05-04 Thread 杨豫鲁
Dear : Hi, There is some question when I use the Xpress from Trans-Proteomic Pipeline for analysis and validation of peptides and proteins ,which was labeled by SILAC, after searching the raw files through sequest( Bioworks Browser ,Thermo Fisher, San Jose, CA) against the NCBI RefSeq

Re: [spctools-discuss] How to set Xpress Options in TPP?

2011-05-04 Thread Jimmy Eng
I would set the Xpress mass tolerance to 1.0 for the LTQ data. In Sequest, 'peptide mass tolerance' is the mass tolerance for the calculated peptide mass, which is a function of MS1 precursor scan accuracy, while 'fragment ion tolerance' is the mass tolerance applied to the ms/ms fragment ions.