Transcript analysis of mRNA for SG proteins revealed no distinct differences in neutrophils of patients with GPS. Heatmaps of mRNA gene expression in granulocytes of GPS patients (A-E), controls (C1, C2) and BluePrint neutrophil reference transcriptomes (BP1-BP7). Of the 34 SG transcripts expressed, 4 were differentially expressed in GPS neutrophils (red boxes in the left panel indicate differentially expressed genes). See also the study by Sims et al.²⁶  SG proteins according to Rorvig et al.²⁵  DE, differentially expressed.