Relative molecular mass is the sum of relative atomic masses.
First of all, you need to understand the meaning of the chemical formula, clarify what types of atoms are contained in a molecule and how many of each are there, and then it will be easy to TO DO.
Calculation formula:
The relative molecular mass of AmBn = the relative atomic mass of A*the number of atoms in A+the relative atomic mass of B*the number d 'atoms in B
(The relative atomic mass can be found: in the Periodic Table of Elements or P63 of the People's Education Edition textbook)
Proteins are composed of amino acids,
and R groups on amino acids are The elements are not fixed.
During protein synthesis, they are transformed into winding, complex spatial structures in organelles.
This exposes the amino and carboxyl groups in the cytoplasm, the S elements can be combined freely,
So what you see may be hydrogen bonds, or S-S disulfide bonds,