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.
Writing Your Paragraph. 1  1. Write a topic sentence. The first sentence of your paragraph needs to be the topic sentence. 2  2. Fill in the supporting details. Once you have written and are happy with your topic sentence, you can start to fill in the rest of your paragraph. 3  3. Write a concluding sentence.