Can anyone list some substances other than penicillian and insulin that are produced by organizms. It seems like most complex molocuels are produced by everything but chemical engineers. Am I correct in thinking that this is because it is very difficult to produce specific complex molocuels on a large scale. It seems like to me that certain compounds can only be created through the use of catylists. Am I correct in thinking this? Also does anyone have any idea on the scale that bacteria and other organizms are used to mass produce substances.