@grandhunter While we don’t have a card dedicated to amino acid properties by group, our amino acid cards ask for polar/non-polar and acidic/basic character. To be user friendly, we lean on reducing the length and number of cards on our deck when adding to them wouldn’t be necessary. I will close out this suggestion, but I do think the mnemonic you shared is very helpful! If you’d find it helpful to include on our current amino acid cards, I’d definitely be willing to accept any suggestions with the mnemonic included in their Extra section