you may be wondering what your doing at the front of a bioengineering madam i a total strangers talking to you right now but i did talk about some of the on some experiments that herbert boyer and stanley commented in the nation you might be thinking to yourself uh... the seventies in america when the dinosaurs lived boring well had never gotten a vaccine are groceries record he started that complex to some of the experiments that these two had halsted setting where they accept and values that cut dat label to in three days continue bacterial dna_ the hanging at the field of genetic engineering and thanks to all the work that they did we have medications for what that means that protective you know i exist on the inside so the first thing that clinton boy it did was they checked dna_ from driving headed up as you might think you guys that's going on in this to you here some dna_ from the front encouraging traits that affect how the front develops had survived now there's a piece that dna_ in this genome whose job listing code for certain proteins that the front uses to survive we're gonna cut this peace out using a restriction enzyme this is the thing that way discovered its kind of like a pair of scissors cutting the dna_ act specific points we can get different pieces now there are times are different kinds restriction enzymes and they'll come in different places in dna_ are and send their resume tuesday is called echo are one now this piece but dna_ has more than one spot that echo are one can cut as shown by the dot lines so we're going to end up with other pieces of dna_ in addition to the one we actually want now that's actually ok because articulate that probably did what's going on in the two is really really discarding after pieces dna_'s just like it now here's a tip plasmid basically circulating of dna_ that can exist in bacteria any basically impose for certain traits that affect how bacteria look actor civilian anti at our dna_ from the frog dna_ try bacterial dna_ we need to cut the president clinton so we've got to add are echo are one scissors and they're going to cut at the site you let this reaction proceeds letting all the ingredients the classmates restriction enzyme and somewhat interesting at cnn_ tel all the plastic cup like that's now we need at the dna_ please and allow the pieces to joint here's what's going on in the to camp i've got pieces earth try to dna_ and i had cracked cut classmates like this i need to ad the sky into this president and the way and they do that is the eddie an enzyme called dna_ like case this enzyme tenet acts like teak and it fixes the dna_ in six th into the test name nine other important thing at that the present itself is that it resent marker than a series of situation in haiti antibiotic contact recycling this will come in handy in a little bit after a little while level couple types of dna_ going on the people non but will come from it you know guardsmen classmates that just caused a mom at the and seat thing about these guys is that they'll actually die if you bad detect recycling antibiotic which we talked about bailey it to them webinar invite you to get the class and inside a vehicle and with that because all the cells down and then quickly he did them up creating little holes and the cell membrane then the president's concert through and get into the south these are the kind of bacteria that we have now bacteria that got the practically but you also get bacteria that cut the president's that we get one say this one with the wrong piece of dna_ way this i was just a plane parts that without any frightening more than likely will get ones that just didn't pick up any of the president's no end in eighteen x display t_-cells on some tight recycling on their plates which is basically some fancy jello that has antibiotic in it so these guys won't be able to grow but these guys well plated people live transformed this tiny plasmids onto this plate which has kept recycling it have likened that what they're saying they need to be here overnight and allow our bacteria to grow watered down in a game in the morning said he didn't have definitely got some colonies regularly remain cell not a problem that we have is we need everyone distinguish that actually had them at these primates from the one that night vis a man who don't have an idea demand resulting famine deal this is the same techniques that we did at the very beginning of this maintenance enemies back smith has been spent on these bacteria then reading is the same restriction enzymes you might be able to notice dot proponents say is a different sizes then that means that comes in the background surrounding areas isn't something larger belmont needs a technique adela electrophoresis and let's get it is it's gonna separate are different pieces of dna_ half and from this experiment will be able to tell the president's that took up the frightening from the ones that did it bought from the ones that just closed up on themselves deflating techniques that i don't know feel their lives galina being made very faint well i thought that i printed a gag thanks for stopping by of the american aircon she'd seen or some of the cloning techniques he's not today disheveled and they say the internet engineering ta waiters k