Definition of implement written for English Language Learners from the Merriam-Webster Learner's Dictionary with audio pronunciations, usage examples, and count/noncount noun labels. Learner's Dictionary mobile search
Protein is composed of amino acids, which are in turn made up of mostly carbon, hydrogen, oxygen, and nitrogen. A few amino acids also contain sulfur: both Cysteine and Methionine. Thus, proteins containing these amino acids would be made up of very small amounts of sulfur, in addition to the more common elements listed above. The five chemical elements of protein are, 1.) sulfur 2.) carbon 3.) hydrogen 4.) oxygen 5.) nitrogen.
The amides contain nitrogen, and nitrogen composes about 16% of the protein atomic content. These proteins are created in the body by condensation of amino acids under the influence of enzyme catalysts, using patterns or direction from the nucleic acids in the cells. The amino acid units in a protein molecule are held together by peptide bonds, and form chains called polypeptide chains. The sequencing of the 20 amino acids forms a kind of alphabet for expression of the type of protein, leading to a very large number of types of proteins.