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.
Transition sentences guide your reader smoothly from the topic of the preceding paragraph into the topic of your new paragraph. Writers sometimes begin with a transition sentence before introducing the topic of the new paragraph. A topic sentence states the main idea of a paragraph. Beginning a paragraph with a topic sentence ensures your reader recognizes early in the paragraph what larger idea the paragraph is going to demonstrate. Expert writers may not introduce the topic until the middle or end of the paragraph, and often imply their topics without ever writing a topic sentence.