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.
CHAPTER I PARTS OF A PARAGRAPH. A paragraph is a group of closely related sentences developing one topic. Good writers always express themselves in a clear and orderly manner. They have learned to make every paragraph tell about one topic only. Topic Sentence or Beginning Sentence.