So this is one out of the many different ways that we can use these different genes as markers. Now, let's move on to the second type of plasma that is more commonly used because it is actually more versatile than this plasma here. So we have PUC 18 plasma. So another more versatile plasma that we can use as a vector to basically amplify recombinant DNA molecules is the PUC one eight. And just like this plasma here, this plasma also contains an origin of replication. And that means we have a beginning.