Question

what are different types of amino acids ?
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Answer 1

Answer:

The 9 essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

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Amino acids are classified into three groups:

Essential amino acids.

Nonessential amino acids.

Conditional amino acids.

Answer 2

Answer:

The 20 to 22 amino acids that comprise proteins include:

• Alanine
• Arginine
• Asparagine
• Aspartic Acid
• Cysteine
• Glutamic acid
• Glutamine
• Glycine
• Histidine
• Isoleucine
• Leucine
• Lysine
• Methionine
• Phenylalanine
• Proline
• Serine
• Threonine
• Tryptophan
• Tyrosine
• Valine
• Selenocysteine
• Pyrrolysine (not used in human protein synthesis)

Of these 20 amino acids, nine amino acids are essential:

• Phenylalanine
• Valine
• Tryptophan
• Threonine
• Isoleucine
• Methionine
• Histidine
• Leucine
• Lysine

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