Protein - Wikipedia
网页A protein is a polyamide. Secondary structure: regularly repeating local structures stabilized by hydrogen bonds. The most common examples are the α-helix, β-sheet and turns. Because secondary structures are local, many regions of different secondary structure can be present in the same protein molecule.
Protein | Definition, Structure, & Classification | Britannica
网页6 天之前 · Protein, highly complex substance that is present in all living organisms. Proteins are of great nutritional value and are directly involved in the chemical processes essential for life. Their importance was recognized in the early 19th century.
High Protein Foods: 16 Foods for High Protein Meals - Healthline
网页2023年10月18日 · What foods are very high in protein? Foods that are highest in protein typically include lean meat, poultry, and seafood. But you can also get protein from eggs, beans, nuts, seeds, and soy...
Protein: What It Is, Types, Uses, Needs, Deficiency - Verywell Health
网页2024年3月21日 · A protein is a large, complex molecule that is a key building block of life. We all know that it is an important part of our diets, but how many of us know how protein actually works in our bodies, and why we need it?
What Are Proteins? Protein Definition, Functions, Examples
网页2017年12月13日 · Proteins are a large class of biological molecules consisting of chains of amino acids called polypeptides. A single polypeptide can make a protein, although many proteins consists of multiple polypeptide subunits. PROTEIN FUNCTIONS. Proteins perform important functions in organisms.
Protein | The Nutrition Source - Harvard T.H. Chan School of …
网页Protein is an essential macronutrient, but not all food sources of protein are created equal, and you may not need as much as you think. Learn the basics about protein and shaping your diet with healthy protein foods.
9 Important Functions of Protein in Your Body - Healthline
网页2023年2月15日 · Here are 9 important functions of the protein in your body. Your body forms thousands of different types of protein — all crucial to your health. Health Conditions
Protein: Sources, deficiency, and requirements - Medical News Today
网页2023年11月15日 · Protein is an essential nutrient for the body to function. This article looks at how much protein a person needs, healthful high protein foods, and tips for getting enough protein.
Introduction to proteins and amino acids (article) | Khan Academy
网页A single cell can contain thousands of proteins, each with a unique function. Although their structures, like their functions, vary greatly, all proteins are made up of one or more chains of amino acids. In this article, we will look in more detail at the building blocks, structures, and roles of proteins.
3.7: Proteins - Types and Functions of Proteins - Biology LibreTexts
网页2023年10月31日 · A protein’s shape determines its function. Proteins are composed of amino acid subunits that form polypeptide chains. Enzymes catalyze biochemical reactions by speeding up chemical reactions, and can either break down their substrate or build larger molecules from their substrate.
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