>>518
https://www.semanticscholar.org/paper/Purine-derivate-content-and-amino-acid-profile-in-Bedn%C3%A1%C5%99ov%C3%A1-Borkovcov%C3%A1/91e856acc71319e9be3f50d937a123a44d2938f4
https://i.imgur.com/pBFbfAm.png