One small StEP in molecular evolution...
Encell
L P
LP
Loeb
L A
LA
D003850:Deoxyribonuclease I / Q000235:genetics / Q000378:metabolism; D019143:Evolution, Molecular; D015723:Gene Library; D016296:Mutagenesis; D016133:Polymerase Chain Reaction; D015202:Protein Engineering / Q000379:methods*; D011506:Proteins / Q000235:genetics / Q000378:metabolism; D013381:Subtilisins / Q000235:genetics / Q000378:metabolism
D011506:Proteins; D003850:Deoxyribonuclease I; D013381:Subtilisins