RECOMBINEERING

http://web.ncifcrf.gov/research/brb/recombineeringInformation.aspx: This site has information more relevant to BAC recombineering

http://ecocyc.com/

http://www.ecosal.org/ecosal/index.jsp

http://www.textco.com  for Gene Construction Kit software

Snapgene.com for SnapGene software