You don't actually have to navigate to the folder to list the files within it. You can simply specify the path as part of the ls command as shown below. ls /path/to/file. By default the files and folders will be listed in columns across the screen and all you will see is the filename.
Alanine (abbreviated as Ala or A; encoded by the codons GCU, GCC, GCA, and GCG) is an Î±-amino acid that is used in the biosynthesis of proteins.
Isoleucine (2-amino-3-methylpentanoic acid) is one of the three branched chain amino acids, an essential amino acid that possesses a chiral side-chain (only other amino acid to do so is Threonine); although it may exist in four isomers, it tends to naturally occur (in foods) as the double S isomer ((2S,3S)-2-amino-3-methylpentanoic acid).