Question

You have been given three amino acids in excess Phenylalanine (P)
Glutamine (Q)
Histidine (R)
All three amino acids are put in a container which already contain some acid and excess of water. How many tripepetides are possible which contain three different amino acids?

Answer 1

Total 6 combinations are possible.
P – Q – R
Q – R – P
Q – P – R
R – Q – P
R – P – Q
P – R – Q