Most striking is a buried arginine side chain (Arg 56 from synaptobrevin/VAMP) that forms internal hydrogen bonds with three glutamines, one from each of the other helices. The high conservation ...

Side chain–side chain contacts between Asp 32, Arg 22 and Tyr 34, Arg 44 are crucial for correct orientation of the arginine side chains. Tyr 34 also accepts a hydrogen bond from the 4-amino ...

These amino acids can be classified based on various criteria, such as their essentiality, polarity, and side chain properties ... The eleven non-essential amino acids are alanine, arginine, ...