Metabolite and surface marker correlations in platelets. Correlation plot displaying all metabolites and surface markers of platelets from the PCs and 48-hour PTR (related to 1 hour). Red boxes indicate positive correlations, whereas blue boxes indicate negative correlations. AMP, adenosine 5′-monophosphate; ATP, adenosine triphosphate; GDP, guanosine diphosphate; GMP, guanosine monophosphate; GTP, guanosine triphosphate; IMP, inosine monophosphate.