Fig. 2: Comparison of dried blood spot and plasma samples.
From: Proteome profiling of home-sampled dried blood spots reveals proteins of SARS-CoV-2 infections
a The volcano plot displays the difference in relative protein levels between dried blood spot (DBS) and EDTA plasma obtained from 12 donors. The differences in the abundance of 92 proteins, reported as normalized protein expression (NPX), are categorized by FDR < 0.01 (horizontal dotted line) and ΔNPX of ± 1 (vertical dotted lines). Blue dots represent proteins with the most significant differences, orange dots show those with noticeable differences, and green dots represent proteins for which no differences were observed. b Frequency of Spearman correlation coefficients for the 92 proteins. The vertical dotted line indicates rs = 0. c Differences in protein IQR between DBS and plasma. The vertical dotted lines have been added for orientation at ΔIQR = 0 and of ±0.5.
