The two sat in the pavilion for more than an hour, and Qianyi picked up the garbage and left.

The one-bedroom and four-hall room belonging to Xiao Ming on the office floor of Yigou has been renovated, and Qianyi has also arranged furniture and air purifiers, and the house can be moved in after two or three months.

In the past two or three months, Xiao Ming is still choosing to live in school.

Life becomes regular, waking up in the morning for a run, going to class, and going to the library.

After studying the biology undergraduate textbook, Xiao Ming launched an attack on Pan Shaxing's biology textbook.

For the first time, he literally learned about the fungus in the phagocytosis 1 colony.

The complex name of Panfloxacin could not be translated in the words here at all, and Xiao Ming could only use letters such as A, B, and C to replace the fungus in the colony.

Here, Xiao Ming discovered the biggest difference between Panfloxacin biology and contemporary biology.

The fungi in phagocytosis 1 colony belong to prokaryotes, but most of them have no cell wall, only a cell membrane full of folds and high strength, and the cell membrane is composed of polymers.

In the human world, prokaryotes without cell walls are not called bacteria, they are called mycoplasma, and panfloxacin is uniformly called bacteria.

"Oh my God!"

Xiao Ming exclaimed in a low voice, most of the cell membranes of the bacteria studied by humans are composed of phospholipids, but the bacteria that engulf 1 colony are not, which is why these bacteria are able to tolerate high acids and alkalis.

How does such a strong cell membrane exchange substances with the outside world?

This is explained later in the textbook.

For example, when bacteria need to exchange substances, the highly folded cell membrane will stretch out and then close in the middle, so that the bacterial structure becomes similar to the figure "8", separated from the top and bottom. Of course, the actual structure will be more complex, and the upper and lower ends of the "8" will show weak electrodes, and the electrodes will attract nearby materials to gather over.

The "0" above the "8" has the cytoplasm saturated with the enzyme system, and the "0" below has the genetic material DNA, which is concentrated in the low electron density region. The reason for this separation is to prevent external substances from attacking the DNA.

Once the bacterial structure is deformed, it begins to "eat".

The enzyme system in the cytoplasm secretes a special enzyme, which will dissolve the cell membrane and let the "0" on it open a hole, so that the outside substance, that is, the "food" of bacteria, will enter the cell from the mouth, and the open cell membrane will be closed immediately after the substance enters the inside.

After the substance enters (taking aromatic hydrocarbon compounds as an example), the enzyme system will secrete decomposition enzymes of aromatic hydrocarbon compounds, which will decompose aromatic hydrocarbon compounds into methane, halogen salts, etc., and some anaerobic intermediate products will also be decomposed into salts, carbon dioxide and water after contact with oxygen. After the metabolism is completed, the bacteria will change from "8" to "0".

In metabolic engineering, some substances and energies are utilized by the bacteria themselves in metabolic processes.

Of course, the complex metabolic degradation process cannot be completed by one bacteria, and the end product of one bacterial metabolism is the starting point of the metabolism of the next bacteria.

In addition, there is a type of bacteria that breaks down metabolic enzymes into the bacteria outside the body, degrades the target in the external environment, and then absorbs the explained products into the body.

Then there will be different enzymes for degradation for different substances, and these enzymes are the expression of bacterial DNA and part of gene expression.

One of the most difficult aspects of bacterial collaboration is that the metabolites of one bacterium are inhibitors of another, and the metabolites become operons that allow another bacterium to stop gene expression or even die. It's a conundrum.

There are dozens of bacteria working together in sewage treatment, so there will be more bacteria working together in municipal sewage.

The textbook specifies the experimental procedure for obtaining bacteria for the treatment of urban sewage.

First, the bacteria were sampled and screened, and the bacterial samples here included not only bacteria in phagocytosis 1 colonies, but also bacteria in municipal sewage.

This is a detailed understanding of the gene expression of each type of bacteria, that is, what kind of pollutants can be degraded by their enzyme systems.

Then, through various means, including gene transplantation, changing gene expression, etc., these bacteria can promote each other instead of dragging each other down, and finally form a perfect sewage treatment colony.

It's quite complex, and the amount of work is quite large.

It will also be applied to gene shearing and splicing technology, as well as the gene expression regulation technology being done by the biological laboratory of Jiangcheng University, but here is the gene expression regulation of prokaryotes.

"I need a helper. Xiao Ming said: "With so many experimental contents, he can only complete it by himself who doesn't know the Year of the Monkey and Ma Yue." ”

Xiao Ming thought of the Molecular Biology Laboratory and Gao Siqi again.

"Huh, you're in the library, why are you so interested in creatures?"

Just when Xiao Ming was deep in thought, Gao Siqi happened to pass by, holding a few books.

"You are?"

Because Gao Siqi was wearing a mask all the time that night, coupled with the environment in the laboratory, Xiao Ming didn't know what Gao Siqi looked like at all.

It wasn't until Xiao Ming saw Gao Siqi's eyes that he remembered and blurted out, "Gao Siqi?"

Gao Siqi sat down in front of Xiao Ming and said, "Shouldn't you call me Senior Sister?"

Gao Siqi had long hair with a shawl, and her eyes were as bright as they were that night.

According to the aesthetic standards of modern people, Gao Siqi is not a beauty with a melon seed face, but she has been dealing with biology for a long time and has a graduate degree, and she has a temperament that many beautiful Internet celebrity girls do not have, which is the unique temperament of intellectuals.

In broad daylight, there are a lot of people in the library.

Gao Siqi's impression in Xiao Ming's mind also changed from the ethereal universe, the hydrogen atoms beating in the dark, and the DNA curled up in a ball to a living person.

"Forgot about me so soon?" Gao Siqi smiled, and the smile made her more real.

"Nope. Xiao Ming said: "I just didn't expect you to come to the library." ”

"To make a stage paper, I just checked some information, graduate research monks!" Gao Siqi said with a sigh.

Indeed, in terms of experimental intensity and academic professionalism, Jiangcheng University is much better than ordinary universities, and graduate students here will become cutting-edge talents in various industries after graduation, while graduate students from other schools may have worse hands-on ability than undergraduate students.

"The effect of operon on the expression of the enzyme system?" Gao Siqi read the notes written by Xiao Ming on the A4 paper, and said: "If you are interested in biology, I can tell my mentor and adjust your major." ”

That's right!

Xiao Ming suddenly thought that Gao Siqi and her classmates were the elite of biology, and with their help, wouldn't they be able to quickly implement the experiment?

Xiao Ming's heart jumped violently and said, "That, senior sister, are you free at night?" I will invite you to dinner and discuss some professional issues with you. ”

"Yes!" Gao Siqi said unceremoniously: "A sauce rabbit outside the school is good." ”