A directed evolution process comprising novel methods for generating improved progeny molecules having desirable properties, including, for example, a method for rapid and facilitated production from a parental polynucleotide template, of a set of mutagenized progeny polynucleotides wherein at least...http://www.google.com/patents/US6709841?utm_source=gb-gplus-sharePatent US6709841 - Exonuclease-mediated gene assembly in directed evolution