Amino Acids, Amides and Chirality (OCR A-Level Chemistry A): Flashcards
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Role of amino acids in proteins
Role of amino acids in proteins
Fundamental building blocks of proteins
Two functional groups in amino acids
Two functional groups in amino acids
Amine () and carboxylic acid ()
Number of common amino acids in human body
Number of common amino acids in human body
20
Amphoteric meaning
Amphoteric meaning
Can react with both acids and bases
Zwitterion definition
Zwitterion definition
Dipolar ion with both + and - charges on same molecule
Isoelectric point (pI)
Isoelectric point (pI)
pH where amino acid exists as zwitterion with no net charge
Primary amide structure
Primary amide structure
One carbon bonded to N:
Chiral centre definition
Chiral centre definition
Carbon bonded to four different atoms or groups
Optical isomers (enantiomers)
Optical isomers (enantiomers)
Two non-superimposable mirror image molecules
Which α-amino acid is NOT chiral?
Which α-amino acid is NOT chiral?
Glycine (R group is H, so two H atoms on α-carbon)