r
, Amino acids
• Amino acids are a group of organic
compounds containing two functional groups –
amino and carboxyl.
• The amino group ( -NH2) is basic while the
carboxyl group ( -COOH ) is acidic in nature
• There are about 300 amino acids occur in
nature. Only 20 of them occur in proteins.
, Structure of amino acids:
Each amino acid has 4 different groups
attached to α- carbon ( which is C-atom next
to COOH). These 4 groups are : amino group,
COOH, Hydrogen atom and side Chain (R)
, When R = H, the molecule is called glycine; when R = CH3, the molecule is called alanine
Aminoethanoic acid 2-aminopropanoic acid
Some R groups are polar, others are less so and still others are non-polar; the polarity of
these groups affects the properties of the amino acids when they are combined to form
proteins
, Amino acids
• Amino acids are a group of organic
compounds containing two functional groups –
amino and carboxyl.
• The amino group ( -NH2) is basic while the
carboxyl group ( -COOH ) is acidic in nature
• There are about 300 amino acids occur in
nature. Only 20 of them occur in proteins.
, Structure of amino acids:
Each amino acid has 4 different groups
attached to α- carbon ( which is C-atom next
to COOH). These 4 groups are : amino group,
COOH, Hydrogen atom and side Chain (R)
, When R = H, the molecule is called glycine; when R = CH3, the molecule is called alanine
Aminoethanoic acid 2-aminopropanoic acid
Some R groups are polar, others are less so and still others are non-polar; the polarity of
these groups affects the properties of the amino acids when they are combined to form
proteins
