Like many people, I have an amino acid / codon cheat sheet posted around my desk that I can look at whenever I need to quickly design a missense mutation into a construct, or get the sense of the relative size differences between two different amino acid side chains. Well, I recently scribbled on the one I had hanging on my desk from when I started, so I had to replace it. But, I took a little time to customize it with information I would find the most useful (eg. reminding me which amino acids were encoded by 6 codons instead of the usual 2 or 4, which is the most frequent codon per amino acid that isn’t ridiculously GC rich). It’s meant for double-sided printing.