Cyanocobalamin is the most common and widely produced form of the chemical compounds that have vitamin B12 activity.
For example, the hadron constituents of atomic nuclei, neutrons and protons, have charges of 0 e and +1 e respectively; the neutron is composed of two down quarks and one up quark, and the proton of two up quarks and one down quark.
The types of quarks are up, down, charm, strange, top and bottom. (Antiquarks also exist.) Protons and neutrons are made up of up and down quarks. The proton is made up of twoâ¦ up quarks and one down quark, and the neutron is made up of two down quarks and one up quark.