Take the 2-minute tour ×
Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

If the lock and key model were true, only one enzyme would be able to catalyze a reaction. However, some enzymes can catalyze multiple reactions. What are some examples of enzymes that can catalyze multiple reactions?

This is not a book or homework question, although I'm aware that I might have phrased it like one...

share|improve this question

closed as too broad by Satwik Pasani, biogirl, kmm Feb 23 at 19:20

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

2  
I think it is still too broad. Anyway, few quick examples would be RuBisCO (oxygenation and carboxylation), DNA polymerase (polymerisation and exonuclease activity) etc. –  Satwik Pasani Feb 23 at 10:00
1  
I'm not sure that's a fair assertion. To use the metaphor, there are some locks that open for several keys, as long as they have a similar motif. The lock and key model allows for "promiscuous" enzymes, it just also allows for very specific enzymes as well. The best evidence against lock and key comes from NMR studies of enzyme dynamics. –  stords Feb 23 at 10:02

Browse other questions tagged or ask your own question.