Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchWindows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstalliTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Engineered bacteria can use an expanded DNA alphabet to encode protein building blocks beyond the standard 20 amino acids. In a 2020 study, researchers showed that semisynthetic bacteria could retain an unnatural DNA base pair, use it to form additional codons, and translate those codons into proteins containing a noncanonical amino acid. This is a specialized research system—not a routine feature of ordinary bacteria or a demonstrated marketed technology.
What does it mean to build a protein with non-natural DNA?
DNA letters and protein building blocks are different things. DNA stores genetic information; proteins are assembled from amino acids. The natural DNA alphabet has four letters, which can be read in three-letter units called codons. There are 64 possible triplet codons: 61 sense codons that specify the standard 20 amino acids and three stop codons.
A noncanonical amino acid is a building block outside that standard set. To place one at a chosen position in a protein, researchers need a codon and translation machinery that directs the cell to use it there. An expanded-alphabet method changes the DNA letters available to write that codon. The engineered cell must also be able to copy or transcribe the added information and decode it during translation.
So “non-natural DNA” does not mean the protein is made of DNA, and it is not the same thing as a noncanonical amino acid. The former changes the information alphabet; the latter changes the chemical building blocks used to assemble a protein.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
How do synthetic DNA letters lead to a new protein?
- Add an unnatural base pair. The semisynthetic-organism approach studied by Zhang and colleagues used an unnatural pair exemplified by dNaM and dTPT3 alongside the four natural DNA letters.
- Write additional codons. With more available letters, researchers can create codons that are not written solely with the natural alphabet.
- Make the information readable. The unnatural bases must be retained and handled by the cell’s information-processing machinery. Engineered transcription and decoding components—including a compatible transfer RNA and aminoacyl-tRNA synthetase—are needed to connect the new codon to a selected amino acid.
- Translate the protein. When the machinery recognizes the codon during protein synthesis, it can insert the noncanonical amino acid at the corresponding position.
The key engineering challenge is therefore not just adding a letter to DNA. The added information must survive the relevant steps from genetic storage through decoding, while the translation system assigns it the intended chemical meaning.
What did the expanded-alphabet study demonstrate?
Zhang et al., writing in Nature Chemical Biology in 2020, reported nine unnatural codons that could produce protein with nearly complete incorporation of an encoded noncanonical amino acid. They also reported that at least three unnatural codons could be decoded simultaneously in the semisynthetic organism, yielding a 67-codon system.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Those numbers describe results in that study, not a guarantee that every added codon, amino acid, protein sequence, or host will work equally well. “Nearly complete” refers to incorporation in the reported experiments; it does not establish uniform performance in every context or a general production capability in ordinary bacteria.
How does this differ from other ways to expand the genetic code?
Adding synthetic DNA letters is one route to more coding options, but it is not the only one. Other systems retain the natural DNA alphabet and engineer how existing or longer codons are decoded. These approaches are related because they can enable noncanonical amino-acid incorporation, but they do not demonstrate an expanded DNA alphabet.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
| Approach and reported study | Host | DNA alphabet expanded? | Codon strategy | Reported result |
|---|---|---|---|---|
| Expanded-alphabet semisynthetic organism, Zhang et al. (2020) | Semisynthetic bacteria | Yes; an unnatural base pair was used | Unnatural codons | Nine unnatural codons produced protein with nearly complete incorporation of an encoded noncanonical amino acid; at least three were decoded simultaneously in a 67-codon system. |
| Quadruplet-codon platform, Costello et al. (2025) | Conventional E. coli | No | Four-letter codons, with improved decoding through changes to codon usage on plasmids | An in-vivo platform for more than 100 new-to-nature peptide macrocycles, containing up to three unique noncanonical amino acids. |
| Genetic-code-expansion systems, Dunkelmann et al. (2021) | Bacillus subtilis | No expanded DNA alphabet reported | Three system families for genetic code expansion | Incorporation of 20 distinct non-standard amino acids. |
The studies use different organisms, designs, and measures of success. Their reported counts are not a standardized head-to-head comparison of efficiency or breadth. A system’s performance depends on whether its decoding machinery works with its host and on the particular amino acid and protein context.
What has been demonstrated beyond these platforms?
A separate 2020 report in Cell Chemical Biology described autonomous bacterial production and incorporation of 5-hydroxytryptophan as a “21st” amino-acid building block. The work included a fluorescently labeled antibody fragment used for oxidative-stress monitoring. This is a related example of bacterial production and incorporation of a non-standard amino acid, but it should not be treated as evidence for the specific unnatural-DNA-letter mechanism described above.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
What are the practical limits?
- Host compatibility matters. An engineered transfer RNA, synthetase, or other decoding component must function alongside the host’s own translation machinery.
- Codons and amino acids are not universally interchangeable. Demonstrating one codon–amino-acid pairing does not establish that a platform can encode every noncanonical amino acid.
- Multiple insertions add difficulty. Incorporating several different or consecutive noncanonical amino acids can be inefficient or unsuccessful in some systems; a review of genetic-code expansion discusses this limitation for in-vitro systems.
- Results are platform-specific. The semisynthetic expanded-alphabet result, the quadruplet-codon work, and the B. subtilis systems establish distinct capabilities. None should be generalized to all bacteria or all proteins.
- Research demonstrations are not proof of commercial readiness. The cited studies report engineered laboratory platforms and applications, not a marketed product based on expanded-alphabet protein production.
What is the main takeaway?
Bacteria can be engineered to build proteins with amino acids beyond the standard 20. In the expanded-alphabet approach, synthetic DNA letters create additional codons, but those codons become useful only when a compatible cellular and translation system can carry and decode their information. Other genetic-code-expansion methods can achieve related goals without adding DNA letters, so the mechanism matters when describing what a particular study has shown.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
