| REAGENT or RESOURCE | SOURCE | IDENTIFIER |
|---|---|---|
| Chemicals, peptides, and recombinant proteins | ||
| Polypropylene glycol-2000 (PPG-2000) | Sigma-Aldrich | CAT#81380 |
| Dimethylolpropionic acid (DMPA) | Sigma-Aldrich | CAT#106615 |
| Isophorone diisocyanate (IPDI) (98%) | Sigma-Aldrich | CAT#317624 |
| Ethylene diamine (EDA) (99.5%) | Sigma-Aldrich | CAT#391085 |
| Triethylamine (TEA) (99%) | Sigma-Aldrich | CAT#T0086 |
| Reagent acetone | Sigma-Aldrich | CAT#179124 |
| Branched polyethylenimine (PEI) (average Mw≈ 25000) | Sigma-Aldrich | CAT#408727 |
| Ammonium hydroxide solution (28–30%) | Sigma-Aldrich | CAT#221228 |
| Poly (methacrylic acid, sodium salt) solution (PMANa, Mw ≈ 4000-6,000, 40 wt % in H2O) | Sigma-Aldrich | CAT#674044 |
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