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.
1. one topic sentence at the beginning. 2. several sentences in the middle giving supporting details and other specific information about. the topic. 3. then one concluding sentence at the end. A paragraph can be any length, long or short, but the average length is usually about four or five. sentences. All paragraphs should begin with an indention the size of about one tab space in order.