Ruzhinji rwemapuroteni anoshanda mumuviri anotorwa kubva ku collagen, iyo yakakoshawo kune ganda, tsandanyama, uye bhonzo. Glycine, proline, hydroxyproline, uye mamwe amino acids akawanda mumuviri wemunhu. Izvo zvinodikanwa pakukura kweanobatanidza tishu seganda, tsinga, mapfupa, tendon, mazino, uye cartilage muvanhu nemhuka.