Reference Terms
from Wikipedia, the free encyclopedia
Peptide bond
A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H2O). This is a dehydration synthesis reaction (also known as a condensation reaction), and usually occurs between amino acids. The resulting CO-NH bond is called a peptide bond, and the resulting molecule is an amide. The four-atom functional group -C(=O)NH- is called an amide group or (in the context of proteins) a peptide group. Polypeptides and proteins are chains of amino acids held together by peptide bonds, as is the backbone of PNA.
Related Stories
1
2
Matter & Energy News
May 9, 2026
May 9, 2026 A major obstacle may be standing in the way of the next generation of ultra-tiny computer chips. Researchers discovered that many promising 2D materials lose their advantages because an invisible atomic-scale gap forms when they are combined with ...
May 6, 2026 Cumberland, B.C. is reimagining its coal mining past as a clean energy opportunity. Water trapped in abandoned mine tunnels could be used in a geothermal system to heat and cool buildings efficiently and with minimal emissions. The project could ...
May 6, 2026 A powerful new electromagnetic thruster has taken a major step forward after a successful high-energy test at NASA’s Jet Propulsion Laboratory. Fueled by lithium vapor and driven by intense magnetic forces, the experimental engine reached ...
May 5, 2026 Creating complex molecules usually requires years of experience and countless decisions, but a new AI system is changing that. Synthegy lets chemists guide synthesis and reaction planning using simple language, while powerful algorithms generate and ...
May 5, 2026 A strange kind of matter that “ticks” forever without energy input has just taken a major leap toward real-world use. Known as a time crystal, this quantum system repeats its motion ...
May 5, 2026 Researchers at Stanford have developed a compact optical amplifier that dramatically boosts light signals using very little power. By recycling energy inside a looping resonator, the device achieves strong amplification with minimal noise and wide ...
May 4, 2026 A new quantum physics study reveals that simply changing a magnetic field over time can unlock entirely new forms of matter that don’t exist under normal conditions. By carefully “driving” materials with timed magnetic shifts, researchers ...
May 4, 2026 Scientists are using sunlight to turn plastic waste into clean fuels like hydrogen, offering a breakthrough solution to both pollution and energy challenges. While still in development, the approach could transform trash into a valuable resource for ...
May 4, 2026 For decades, relaxor ferroelectrics have powered everything from medical ultrasounds to sonar systems, yet their inner atomic structure remained a mystery—until now. Researchers have finally mapped ...
May 1, 2026 In a striking glimpse into extreme physics, scientists have captured the split-second chaos that unfolds when powerful laser flashes blast matter into a superheated plasma. By combining two cutting-edge lasers, researchers were able to track how ...
May 1, 2026 Scientists have created a powerful new way to control quantum systems, achieving the first-ever demonstration of quadsqueezing—an elusive fourth-order quantum effect. By combining simple forces in ...
May 1, 2026 A team at King’s College London has created a powerful new aluminum compound capable of doing the work of expensive rare metals. Its unique triangular structure gives it remarkable stability and reactivity, allowing it to drive chemical reactions ...
Latest Headlines
updated 12:56 pm ET
May 9, 2026 Physicists may have just cracked open a hidden side of the quantum world. For decades, every known particle was thought to belong to one of two categories — bosons or fermions — but researchers ...
May 8, 2026 Scientists may have uncovered a surprising secret behind why life exists at all. A new study suggests that the Universe’s fundamental constants — ...
May 6, 2026 In a major breakthrough, scientists have experimentally confirmed a universal growth law in two dimensions using a quantum system of fleeting light–matter particles. The finding strengthens the ...
May 3, 2026 Physicists are rethinking one of quantum mechanics’ biggest puzzles: how fuzzy possibilities become definite reality. New research suggests that spontaneous “collapse” processes—possibly ...
Apr. 30, 2026 Scientists have pulled off a first: teleporting a photon’s state between two separate quantum dots. This was done over a 270-meter open-air link, proving quantum information can travel between ...
Apr. 28, 2026 Quantum physics once shocked scientists by revealing that particles can behave like waves—and now, that strange behavior has been pushed even ...
Apr. 28, 2026 A massive cosmic milestone has just been reached: scientists have completed the largest high-resolution 3D map of the universe ever created. Built using data from over 47 million galaxies and ...
Apr. 28, 2026 Researchers have, for the first time, directly visualized how electronic patterns known as charge density waves evolve across a phase transition. ...
Apr. 27, 2026 A group of undergraduate students pulled off something remarkable: they built their own dark matter detector and used it to probe one of physics’ biggest mysteries. Working with limited resources ...
Apr. 27, 2026 In a breakthrough experiment, scientists directly imaged how particles pair up in a system that mimics superconductors. Instead of behaving ...