This chart depicts the essential amino acids needed by the body to perform specific functions. These amino acids all hold specific functions that turn out to be helpful to specific parts of the body when put into a specific order by the ribosome.
Vegvisir ("the viking compass"). It is said that if this sign is carried, one will never lose one's way in storms or bad weather, even when the way is not known. It is encircled by protection runes. This would be a cool tattoo.