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.
paragraph in British English. paragraphnoun [ C ] B1 a short part of a text, consisting of at least one sentence and beginning on a new line. It usually deals with a single event, description, idea, etc. Can you pick out the three deliberate mistakes in this paragraph? Cut that paragraph and then paste it at the end of the page.