Add reference Expected reporter ion ratios: Erwinia peptides: 1:1:1:1:1:1 Enolase spike (sp|P00924|ENO1_YEAST): 10:5:2.5:1:2.5:10 BSA spike (sp|P02769|ALBU_BOVIN): 1:2.5:5:10:5:1 PhosB spike (sp|P00489|PYGM_RABIT): 2:2:2:2:1:1 Cytochrome C spike (sp|P62894|CYC_BOVIN): 1:1:1:1:1:2