super medical system

Chapter 163 Enzymatic reactions and Cinderella and the prince

Zhao Yue'er bit the tip of her pen and pondered over the textbook on the table. After thinking for a long time but still couldn't think of the answer, she couldn't help but sighed faintly.

In order to avoid harassment from Mohawks, she has changed her position from the third floor to the second floor. It's not that she doesn't want to leave the library, but it's because the teaching building is used for some activities these two days. It's full of leaders and there is no careful location. .

As for the dormitory...

Can you still study hard while staying in the dormitory?
The sisters are all watching dramas and playing games, how embarrassing it is to study hard by yourself!

Zhao Yue'er knew that she must have gotten into a dead end, at this time someone should give some advice, just a little bit, and she would definitely be able to understand everything.

But who will call it?
Zhao Yue'er sighed again, holding her face in her hands, if only he was here...

Her eyes wandered leisurely, but Zhao Yueer was taken aback when she swept the winding stairs, this, isn't this... Yang Tian!

Afraid that she was mistaken, Zhao Yue'er didn't think too much, stood up and waved to that side, waving and shouting:

"Brother God!"

"Ok?"

Holding two thick anatomical atlases in his arms, Yang Tian frowned and turned around, just in time to see a girl who was waving at him not far away.

Isn't this the girl I met in the cafeteria yesterday?
After a glance, it was still a blue casual top, denim suspenders, airport, short hair, black-rimmed glasses, and a light-colored schoolbag. Yang Tian nodded to express his politeness, and then wanted to continue down.

"and many more!"

"how?"

Yang Tian looked at the girl who had already run over, he was a little puzzled, why did he stop him?
"That..." Zhao Yue'er was a little excited, her cheeks turned reddish due to the congestion.

Taking a closer look, Yang Tiancai found out that although this girl is not as good-looking as Han Bing, nor as smart and cute as Xie Xin, nor as stupid and cute as Wang Zhi's sister, who is this year's Department of Nursing, she still looks pretty good .

I can watch it, I can't get tired of it, it's the type of girl next door.

"What's the matter, just tell me directly." Seeing that Zhao Yue'er was stunned in front of him for a long time but couldn't hold back a word, Yang Tian said, if nothing happened, he would go back to the dormitory to study!

To use a sentence on the Internet to describe the current Yang Tian, ​​that is - addicted to study every day, unable to extricate himself.

"Yes, that's how it is." Zhao Yue'er was in a hurry, and finally caught Yang Tian. This guy doesn't come out once in hundreds of years, so what if he runs away again?Immediately let go of all restraint, "Can I ask you a question? It's biochemical."

"Problem."

Yang Tian reckoned that he had basically learned the contents of the biochemistry textbooks issued by the school in the systematic learning space, and the general topics should not take too much time.

"alright."

Yang Tian followed Zhao Yueer to the table and saw the question she wanted to ask.

"It's like this. The question is very simple. What is the change in the Km value of the enzymatic reaction during competitive inhibition? The answer is increase. I can understand this, but you can see that the answer analysis not only gives the competitive inhibition Sexual inhibition, also gives the change of two values ​​for non-competitive inhibitors and anti-competitive inhibitors."

Zhao Yueer began to explain her doubts in detail beside her, she frowned slightly, and tapped her fingers lightly, trying to make Yang Tian understand where her doubts were, it was completely different from when she was treating Mo Xigan's head irritably and threw the book away And language.

"I can probably guess the principle of non-competitive inhibitors, but why did anti-competitive inhibitors change like this?"

Yang Tian silently read the table of questions and answers, and then looked at Zhao Yue'er who was frowning and began to bite her pen again, "Well, let me first talk about your understanding of the two kinetic parameters Km and Vmax."

"Well, that's it." Zhao Yue'er thought for a while and organized her words, "These two parameters are related to the inhibitory effect of the inhibitor on the enzymatic reaction, so let me talk about the enzymatic reaction first. .”

"In chemistry, there is a thing called a catalyst. The function of a catalyst is to change the speed of a reaction that was originally carried out step by step. For example, a reaction that normally takes 5 minutes can be completed within three seconds after adding a catalyst. Finish."

"Well, let's continue." Yang Tian nodded.

Zhao Yueer's complexion became a little normal. Once she started to discuss and study, she was freed from that state of fear and fear. After clearing her throat, Zhao Yueer continued to speak.

"An enzyme is actually a catalyst, and it is a catalyst unique to organisms, which can catalyze various reactions in organisms efficiently. Generally speaking, enzymes are proteins, but some enzymes are nucleotides."

Zhao Yueer continued under Yang Tian's encouraging eyes, "Enzymatic reactions are reactions catalyzed by enzymes. Almost every reaction in our body is an enzymatic reaction."

"If there is promotion, of course there is inhibition. When the enzyme promotes the reaction, there are also [enzyme inhibitors] to resist the action of the enzyme, so that the reaction does not go so smoothly. We call this enzyme inhibition."

"Enzyme inhibition can be mainly divided into reversible inhibition and irreversible inhibition. In irreversible inhibition, the inhibitor will destroy the enzyme molecule, make the enzyme lose its function, and cannot be recovered, which is equivalent to drawing salary from the bottom of the pot."

"In reversible inhibition, the inhibitor will temporarily reduce the activity of the enzyme, which is probably equivalent to pulling the enzyme from doing its job, thus increasing the time it takes for this job to complete."

"Yes." Yang Tian nodded, "You continue."

Zhao Yue'er had completely calmed down at this time, and her voice returned to normal, "In this way, as long as the enzyme can break free from the inhibitor's hand, it can continue to promote the reaction, so it is possible to explore how the reaction will proceed."

"The Km value is the characteristic constant of the enzyme, that is, the Michaelis constant. Its value is equal to the substrate concentration when the enzymatic reaction rate reaches half of the maximum reaction rate. It can be used to express the affinity of the enzyme to the substrate. The smaller the Km, the greater the affinity." Big."

"And Vmax is the maximum reaction rate of the enzymatic reaction."

"Well, I'm done."

Zhao Yue'er looked at Yang Tian who was nodding and pondering, feeling a little apprehensive.

"That's very good, you understand it thoroughly, but it's not straightforward enough." Yang Tian nodded, "Let's just give an example, Cinderella can become a princess, but the premise is to marry the rich and handsome prince."

"Among them, Cinderella is the substrate, the princess is the product, and the rich and handsome prince is our enzyme. It is worth noting that without the rich and handsome prince, Cinderella is impossible to change, and the rich and handsome prince is still the rich and handsome prince before and after marriage. The self has not changed, just like the enzyme in the enzymatic reaction will not change."

Yang Tian glanced at Zhao Yueer and continued.

"Suppose we have many Cinderellas here, and many princes. The task of the princes is to turn all the Cinderellas into princesses."

"A prince can only marry one Cinderella at a time, but after the wedding, he can continue to marry the next Cinderella, but as a girl, Cinderella can only marry one prince, and she can't change after the marriage. Back to virginity."

Zhao Yue'er's eyes lit up after listening to these remarks, it seems that this truth is much more useful than what he just said!Simply incisive, isn't it!

Brother Tian is really amazing!

(End of this chapter)