TY - RPRT TI - Early protein evolution: building domains from ligand-binding polypeptide segments. AU - Lutz Riechmann AU - Greg Winter PY - 2006 DO - 10.1016/j.jmb.2006.08.031 UR - https://pubmed.ncbi.nlm.nih.gov/16978646/ ID - 16978646 ER -