PFR,UniProt Id,Entry Accession,Entry Description,Isoform Accession,Isoform Description,Isoform Sequence,Start,End,Length,Proteoform Sequence,Monoisotopic Mass,Average Mass,Sequence Modifications,PTMs,N-Terminal,C-Terminal,Star 8539,MUCEN_HUMAN,Q9ULC0,Endomucin,Q9ULC0-2,2,MELLQVTILFLLPSICSSNSTGVLEAANNSLVVTTTKPSITTPNTESLQKNVVTPTTGTTPKGTITNELLKMSLMSTATFLTSKDEGLKATTTDVRKNDSIISNVTVTSVTLPNAVSTLQSSKPKTETQSSIKTTEIPGTPENGNDQPQSDKESVKLLTVKTISHESGEHSAQGKTKN,0,177,178,MELLQVTILFLLPSICSSNSTGVLEAANNSLVVTTTKPSITTPNTESLQKNVVTPTTGTTPKGTITNELLKMSLMSTATFLTSKDEGLKATTTDVRKNDSIISNVTVTSVTLPNAVSTLQSSKPKTETQSSIKTTEIPGTPENGNDQPQSDKESVKLLTVKTISHESGEHSAQGKTKN,18878.76730969,18890.27038,,RESID:49@0,,,1