Most of the 20 standard amino acids are chiral, and most of…

Most of the 20 standard amino acids are chiral, and most of the standard chiral amino acids have the R configuration at the alpha-Carbon (C-alpha). All of the standard chiral amino acids are L-amino acids. For the chiral standard amino acids, ribosomes only use the L enantiomer to make proteins. Which amino acids in the peptide shown below are NOT L-amino acids? (be sure to select 2 correct answers)  

Which of the following options most closely matches the expe…

Which of the following options most closely matches the expected net charge on HIV Tat peptide at pH 7.3? HIV Tat peptide has the following amino acid sequence: GRKKRRQRRRPPQC-NH2 HINT: The “-NH2” refer to the carboxy terminus being amidated. That is the C-terminal end has an amide group (CONH2) instead of a carboxylic acid (COO-).