2 4 2 hydroxyethyl piperazin 1 yl ethanesulfonic acid

8‐Hydroxyquinoline (oxine), sodium citrate, NaOAc, Na₂CO₃, and 2‐[4‐(2‐hydroxyethyl)‐piperazin‐1‐yl] ethane sulfonic acid (HEPES) solution were purchased from Sigma–Aldrich (St Louis, MO). Dimethyl sulfoxide (DMSO) was obtained from Acros Organics (Belgium, USA). DFS was purchased from Innochem (Beijing, China). DFP was purchased from MedChem Express Ltd. Deferoxamine mesylate (DFO) was purchased from Novartis China. Gallium nitrate hydrate and zirconium tetrachloride were obtained from Innochem (Beijing, China). ⁸⁹Zr‐oxalate was obtained from Dongcheng AMS Pharmaceutical Co., Ltd (Nanjing, China). ⁶⁸Ga³⁺ solution was eluted from a ⁶⁸Ge/⁶⁸Ga generator (ITG, Germany) with 4 mL of 0.05 M HCl (Merck, Germany), from which the 0.5 mL fraction with the highest radioactivity was used for further experiments. β‐Actin internal reference primers, MSCs markers primer sequences used for real‐time qPCR were obtained from Sangon Biotech Co., Ltd. (Shanghai, China).

2-[4-(2-hydroxyethyl)piperazin-1-yl]ethanesulfonic acid, phenylmethanesulfonylfluoride (PMSF), 2.5-dihydroxybenzoic acid, ethylenediaminetetraacetic acid (EDTA), nicotinamide adenine dinucleotide phosphate, sodium dithionite, trypsin, and sodium deoxycholate were purchased from Sigma-Aldrich (St. Louis, MO, USA); acetonitrile and trifluoroacetic acid were purchased from ICN Pharmaceuticals Inc. (Costa Mesa, CA, USA); Coomassie Brilliant Blue R-250 was purchased from Fluka (Seelze, Germany). Modified trypsin (catalog no. V511C) was obtained from Promega (Madison, WI, USA). Other chemicals were purchased from Reakhim-Penza, LLC (Penza, Russia).