Journal: bioRxiv
Article Title: Evaluating First-Pass, High Protein Capacity Desalting Techniques For Phosphoproteomics Applications
doi: 10.1101/2025.06.03.657744
Figure Lengend Snippet: Samples prepared using ProtiFi S-Trap show superior identification of biologically relevant, T cell receptor responsive pY sites. (A) Simplified schematic of T cell receptor signalling. (B-E) Volcano plot analysis comparing pY site abundance between 2 minutes and 0 minutes of stimulation for samples prepared using Waters Sep-Pak C18 columns, Pierce C18 spin columns, TECAN WWP2 NBE columns, and ProtiFi S-Trap spin columns, respectively. Values to the left indicate the number of unique pY sites in a given threshold (0.1 > q ≥ 0.05, 0.05 > q ≥ 0.01, 0.01 > q from bottom to top). (F) Western blot analysis of PLCγ1 Y783 with accompanying quantification. *** indicates p < 0.001 by a Welch’s T-test. (G) Heatmaps comparing 2 minutes and 0 minutes of T cell receptor stimulation for unique pY sites. Grey squares indicate n ≤ 3 replicates for a given pY site in either 2- or 0-minute groups. * indicates 0.1 > q ≥ 0.05, ** indicates 0.05 > q ≥ 0.01, *** indicates 0.01 > q.
Article Snippet: Primary antibodies: pY clone 4G10 (1:2000, Cell Signalling Technologies #96215), GAPDH (1:10000, Millipore Sigma #G9545), PLCγ1 (1:10000, Millipore Sigma #05-163), PLCγ1 Y783 (1:2000, Cell Signalling Technologies #2821), Erk1/2 (Cell Signalling Technologies #9107), Erk T202Y204 (1:2000, Cell Signalling Technologies #9101) Secondary antibodies: IRDye 680RD Goat anti-Mouse IgG (LI-COR #926-68070) IRDye 800CW Goat anti-Mouse IgG (LI-COR #926-33210), IRDye 680RD Donkey anti Rabbit IgG (LI-COR #926-68073), IRDye 800CW Donkey anti Rabbit IgG (LI-COR #926-32213)
Techniques: Western Blot