Note: Anti-GFP nanobody resin can be obtained multiple ways. First, you can buy it pre-made from a company. Second, you can buy CNBr-activated Sepharose and couple it (following manufacturer's instructions) to prepared anti-GFP nanobody. Finally, you can buy Sepharose resin, activate it with CNBr in your laboratory, and couple it to prepared anti-GFP nanobody. This is the cheapest option, but you will need to have appropriate practices in place to handle CNBr, which is very toxic.
Note: We use ~ 1–1.5 mg anti-GFP nanobody per 1 mL of hydrated resin for coupling.
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