What is the charge on the tetrapeptide lys-lys-his-glu at ph 7?
1 answer:
Answer: The charge on peptide chain lys-lys-his-glu at pH 7 is +1.
Explanation: A peptide chain is the chain formed from the condensation of two amino acids releasing molecule and forming N-terminal(Nitrogen- end) and C-terminal(Carboxyl-end). The bonds formed are known as peptide bonds.
Here 4 amino acids join together forming a peptide chain
In this peptide chain N-terminal is from lysine (lys) and C-terminal is from Glutamic acid (Glu).
At pH=7,
- The carboxyl (-COOH) groups will be deprotonated that means they will not have H-atoms and have (-1) charge.
- The Amino (
) groups will be protonated that means they have H-atoms and have (+1) charge.
So, there are 3 amino groups present each having (+1) charge and 2 carboxyl groups each having (-1) charge.
Total charge on peptide chain =
= +1
You might be interested in
Explanation:
According to Bohr's postulates, the electron in the present in the lower energy level can absorb energy and exits to higher energy level. Also, when this electron returns back to its orbit, it emits some energy.
Since the hydrogen consists of 1 electron and 1 proton. The lowest energy configuration of the hydrogen is when n =1 or, when the electron is present in the K-shell or the ground state.
The possible transition for the electron given in the question is :
n = 2, 3 and 4
The schematic diagram of the hydrogen atom consisting of these four quantum levels in which the electron can jump (Absorption) and comeback to from these energy levels (emission) .
