Table S3 . (C and D) Histograms of log2 ratios of the summed intensity of the erythrocyte-specific proteins and the summed intensity of all proteins in the HBS (C) and LCC (D) cohorts. A sample was flagged for potential contamination and removed from further analysis if the ratio differed more than one SD from the mean of all samples within the cohort. (E) Comparison of erythrocyte counts in CSF following sample collection and degree of erythrocyte contamination as determined by MS-based proteomics of all LCC cohort samples. Samples colored in red were excluded from further analysis based on the distribution shown in (D). (F) Grouping samples in the LCC cohort for four sample collection centers demonstrated a high degree of contamination with erythroid-specific proteins for study centers 2 and 4, whereas there was no indication of this in study centers 1 and 3. " width="100%" height="100%">
Journal: Cell Reports Medicine
Article Title: Proteome profiling of cerebrospinal fluid reveals biomarker candidates for Parkinson’s disease
doi: 10.1016/j.xcrm.2022.100661
Figure Lengend Snippet: Quality assessment of two independent CSF PD cohorts (A and B) Assessment of study quality by determining the percentage of the summed intensity of the proteins in the respective quality marker panel and the summed intensity of all proteins in the HBS (A) and LCC (B) cohorts. Erythrocyte-specific protein panel (red), platelet marker panel (turquois), coagulation marker panel (orange), and the top 10 most abundant protein panel (dark gray) are included in these analyses. The proteins in each quality marker panel are listed in Table S3 . (C and D) Histograms of log2 ratios of the summed intensity of the erythrocyte-specific proteins and the summed intensity of all proteins in the HBS (C) and LCC (D) cohorts. A sample was flagged for potential contamination and removed from further analysis if the ratio differed more than one SD from the mean of all samples within the cohort. (E) Comparison of erythrocyte counts in CSF following sample collection and degree of erythrocyte contamination as determined by MS-based proteomics of all LCC cohort samples. Samples colored in red were excluded from further analysis based on the distribution shown in (D). (F) Grouping samples in the LCC cohort for four sample collection centers demonstrated a high degree of contamination with erythroid-specific proteins for study centers 2 and 4, whereas there was no indication of this in study centers 1 and 3.
Article Snippet: Proteomics-grade modified trypsin , Sigma-Aldrich , Cat. no. T6567.
Techniques: Marker, Coagulation