Phenylalanine, tyrosine, tryptophan. Aliphatic amino acids: These are ones which have aliphatic groups like -CH2- in between carboxylic and amine moiety. They are the ones excluding aromatic amino acids from the above list of both essential and non-essential ones.
What is a paragraph? A paragraph is a collection of related sentences dealing with a single topic. Learning to write good paragraphs will help you as a writer stay on track during your drafting and revision stages. Good paragraphing also greatly assists your readers in following a piece of writing.
Begin a new paragraph when you switch from one W to another. Creative writing paragraphs are more flexible than paragraphs in argumentative, academic papers. However, a good rule of thumb is that you should begin a new paragraph whenever one of the major W's of writing is switched. For example, if you switch from one place to another setting, begin a new paragraph.