I've been trying to use the cufflinks-cuffmerge-cuffdiff flow to analyze my RNAseq data. However, cuffmerge lost my p_id. My p_id was originally from changing the protein_id to p_id by myself in the gtf file. The current p_id showed up in the same attributes column as gene_id in the gtf file. Does anyone know how to make it reachable by cuff? I'm using galaxy public platform. Apparently in the history people say solving the problem by writing an extra code. But I cannot find anywhere to input codes in galaxy.

Do I have to run everything on my own computer?

Thanks a lot!!!!!

Nancy