Ii-Protons zenziwe ngee-quarks. I-proton inye kukholelwa okokuba yenziwe ngee-quarks ezintathu, ezimbini ziiquarks-eziphezulu ize enye ibeyi-quark esezantsi. i-quark esezantsi inetshaji okanye uzibuthe we-1/3, zize zona ii-quarks eziphezulu zibenetshaji ye-+2/3 inye. Oku kongeza ye-+1. I-proton ine-mass encinane. Ubunzima be-proton bumalunga ne-atomic mass unit enye. Ubunzima be-neutron nabo bumalunga ne-atomic mass unit enye. Ubukhulu be-proton bubonakala ngokungcangcazela kwee-quarks ezikuyo, kwaye ezi-quarks zenza ilifu. Oko kuthetha okokuba i-proton akuyo bhola iqine kangako xa ithelekiswa nendawo equlethe ii-quarks.