Protein antuk sifat maguna sampun marevolusi antuk lingsehan mutasi miwah seleksi sané maulang-ulang (minakadi enzim sané kamodifikasi miwah antibodi anyar) sané mawasta evolusi terarah.
Proteins with valuable properties have evolved by repeated rounds of mutation and selection (for example modified enzymes and new antibodies) in a process called directed evolution.