cat. no. C423; UniProtKB ID Q15109; Ala23-Ala344 with C-terminal hexa-histidine
tag) was purchased from Novoprotein (Summit, NJ), anti-sRAGE affimers
(raised against recombinant human sRAGE from Novoprotein, cat. no.
C423) were produced and supplied by Avacta Life Sciences (Wetherby,
U.K.), and stable-isotope-labeled RAGE peptides (i.e., IGEPLVL
Acetonitrile (ACN; LC–MS grade) was obtained from Biosolve
(Valkenswaard, The Netherlands), and sequencing grade modified trypsin
was purchased from Promega (Madison, WI). Nunc-Immuno MicroWell 96-well
plates with MaxiSorp coating (cat. no. M9410), bovine serum albumin
(BSA; cat. no. A7638), Trizma base (tris; cat. no. T6791), and phosphate-buffered
saline (PBS; 10×; cat. no. D1408) as well as all other chemicals
were purchased from Sigma-Aldrich (Zwijndrecht, The Netherlands).