Lan Ze and Captain Zhang He happily spent a few days on the southern coast.

After Lan Ze came back, he sold the fake and started working around again.

In the Department of Mathematics, the most important thing is the half-day discussion class every week. Unfortunately, it coincides perfectly with his travel time, so there is no chance of missing class.

In the School of Life, he missed several tutoring classes.

He sincerely apologized to the students.

There has never been an option to make up for missing classes, so we can only postpone them later. After the main course of "Mathematical Methods", students came to him more often than usual and accumulated a lot of questions. If he never comes back, he will take this course.

It’s time for the teachers in the class to find him to blame.

However, even though they are back, their Wanxin is still wandering thousands of miles away.

In desperation, I had no choice but to get myself busy first.

Just tutoring classes and answering questions after class are enough to make people work hard. The remaining time was evenly divided between reading mathematics papers and improving the biochemistry editor.

After filling up his timetable, sure enough, his mind stopped thinking.

Lan Ze made up his mind that if he had any random thoughts, he would wait until bedtime to contact Captain Zhang Da. Although he might not be able to contact Zhang He, he could at least leave a message.

If you're lucky, you'll be able to see the reply that Sister Zhang left at some point.

Under this uncomfortable situation, Lanze discovered that his efficiency had evolved to an outrageous level.

One day before lunch break, he declared in the laboratory: "The editor I made can design completely new microorganisms."

The senior brothers and sisters in the laboratory looked at him with crazy eyes.

The junior brothers and sisters who helped with the auxiliary experiments looked up at the halo on his head with stars shining in their eyes.

"Really!" Lanze explained, "It's alive and can directly synthesize DNA, just like other microorganisms!"

"Use DNA? Not RNA?" Finally, a senior brother asked him suspiciously.

In this era, using RNA to design viruses is a prominent science. It is a practical technology and quite valuable.

Large biochemical companies have invested large sums of money into this emerging industry, and the output is shining like gold. Good design is like gold mining in the sand, rare and easy to use. This is because the threshold for biological design itself is very high and requires large-scale

Gene database support.

Viruses are much simpler than cellular organisms and are a combination of ribose and protein.

"Inject it into enucleated cells and they can reproduce," Lanze said.

Hearing this, the senior brother breathed a sigh of relief and then asked: "Then what is the difference between yours and theirs upstairs?"

The difference was a bit big, and Lan Ze couldn't tell it for a moment.

For example, as long as they do not collapse and disintegrate, normal cells can gradually repair themselves; moreover, normal cells can reproduce.

His editor can design such cells. As a living thing, these things should be done, so it is not surprising.

In several laboratories upstairs, what they did was to edit and synthesize the DNA of cellular organisms. However, they used the DNA of existing organisms and modified them.

His editor can do more. Strictly speaking, it can create a brand new creature that has been tested by the algorithm. If the DNA chain is successfully synthesized and injected into the cell with the nucleus removed, this little creature,

It must act according to its own algorithmic logic.

Lan Ze was asked and pondered for a long time.

By the time he came to his senses, all the people eating had left, leaving only a few colleagues who were usually not active in eating.

Lan Ze calmed down for a while and felt that it was necessary to write a document for the editor. At least, he also needed to prepare a manual for the biochemical editor. In case after a long time, he himself forgot what he had done.

Of course, it is more important to have lunch before starting to write the instructions.

How to write a manual is a tricky thing.

Lan Ze was still thinking while eating in the cafeteria.

Strictly speaking, there are no technical obstacles in any aspect of synthetic biology.

A string of DNA sequences in a specific order can already be synthesized in the laboratory. DNA synthesis is actually the assembly of nucleotides. About the second half of the 21st century, there were already laboratories that could accurately assemble. For ribonucleic acid (

There are no technical obstacles to linking RNA fragments or DNA fragments.

So far, the only obstacle to biological design is that the design itself relies heavily on nature, the prehistoric programmer.

Most of the results of arbitrarily changing the program of nature are wrong, and the price of making a mistake is death. Most of the remaining changes will not produce any changes.

Only a very small proportion of changes have been made, and it is better than the original design.

This kind of program change is the essence of biological mutation and evolution.

As early as the 20th century, humans imitated nature's biological evolution method and invented genetic algorithms; artificially randomly created small changes on computers and repeated trial and error to find better solutions for various situations.

This algorithm can sometimes produce perfectly working results; but sometimes...

Evolution is blind.

Therefore, the vagus nerve and the blood vessels in the neck are intertwined, taking strange detours and oppressing each other from time to time; a person will faint after being stabbed on the left side of the neck. This is not a made-up dramatic effect, but because the blow hit a real existence.

on the nerves.

The optic nerve of the human eye pokes a big hole in the retina, so there are blind spots where things cannot be seen.

The vas deferens hanging from the vagina goes around the top of the ureter. The way is too far, so if you are not careful, you will get pain in your balls. The tube goes around and pokes a hole in the abdominal cavity. If the intestine accidentally falls in, it will become a hernia.

Life design is large-scale programming.

Creating new virus-like biochemical structures to accomplish specific tasks was probably the limit of human practical technology as of the 1930s.

There is no need for prokaryotic cell design to exist in its awkward position, right between the reliable and practical viruses and the widely watched eukaryotic cells.

Most of the organisms that people care about are eukaryotes. From yeast to Chinese cabbage, from mushrooms to kittens and puppies, there is no exception.

Everyone likes eukaryotic cells, but their complexity rivals the planning and design of cities.

Consider using binary code to write city planning, which is also full of meaningless jumps, nesting and loops. It is enough to make people's brains dizzy. It just so happens that the eukaryotic cell programming left by nature is full of

Code fields that do not standardize the operation process; from time to time, distant field sequences communicate with each other through resonance, which adds to the complexity.

For any kind of cellular organism, humans can only cautiously use the existing gene pool to tentatively rewrite it.

It is impossible to create a new life.
Chapter completed!