The Structural Formulas for the 20 Naturally Occurring Amino Acid

question 41

Short Answer

The structural formulas for the 20 naturally occurring amino acid residues are shown in the panel below. Answer the following question(s) with the help of this panel.

-Which of the amino acids shown above has the most limited combinations of phi (?) and psi (?) angles in its Ramachandran plot? Write down the one-letter abbreviation for it, e.g. A.

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Definitions:

Reversing Entries

Journal entries usually made at the beginning of an accounting period to reverse or cancel out adjusting entries from the end of the previous period.

Allowance Method

An accounting technique used to anticipate and adjust for potential future losses from uncollectible accounts receivable.

Uncollectible Accounts

Accounts receivable that are recognized as not being collectible, leading to a write-off as a bad debt expense.

Bad Debts Expense

Bad debts expense is an estimate of the accounts receivable that a company does not expect to collect, treated as an expense on the income statement.