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Biochemistry

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Amino Acids, Proteins and Porphyrins

Question
21 out of 36
 

Fastest moving amino acid in methanol chloroform electrophoresis is? (AIIMS May 2009)



A Glycine
B Aspartic acid

C Valine
D Leucine

Ans. B Aspartic acid

Aspartic acid is negatively charged amino acid so will move fastest in electrophoresis.

Amino acids

1. Acidic amino acid

They have two – COOH gp& one – NH2 gp. At neutral pH their side chains are fully ionized containing a negatively charged – COO ion.

2. Basic amino acid

They have one – COOH gp& two – NH2gp.

At neutral pH, there side chains are fully ionized & positive Charged

Classification Of Amino Acids On The Basis Of Side Chains

A. Hydrophobic (Non polar) A.A :

Tryptophan

Tyrosine

Methionine

Leucine

Isoleucine

Alanine

Phenylalanine

Proline

B. Hydrophilic (Polar) A.A

Uncharged Polar side chain

Serine

Asparaginase

Threonine

Cysteine

Tyrosine

Glycine

Acidic side chain

Asparagine

Glutamine

Aspartic acid

Glutamic acid

Basic Side Chain

Histidine

Arginine (Most basic)

Lysine

C. Aliphatic A.A

Glycine

Alanine

Valine

Leucine

Isoleucine

D. Aromatic A.A

Tyrosine

Tryptophan

Phenylalanine

Histidine

E. Side Chain Containing

Hydroxyl (OH) group

Tyrosine

Threonine

Serine

Sulfur atoms

Cysteine

Methionine

Immino Acid

Proline

Classification of Amino Acids on the basis of metabolism

Essential Amino Acid, Leucine, Lysine, Threonine, Histidine, Arginine, Valine

Isoleucine, Phenylalanine, Methionine, Tryptophan

Ketogenic A.A Glucogenic A. A. Both Glucogenic&Ketogenic A.A.

Leucine Valine Isoleucine

Lysine Cysteine, Serine Tyrosine

Alanine Tryptophan

Histidine Phenylalanine

Threonine

Aspartate

Arginine

Glycine, Glutamate

Proline / Hydroxyproline

Amino Acids, Proteins and Porphyrins Flashcard List

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