Amino Acids And Proteins an der Chinese University Of Hong Kong | Karteikarten & Zusammenfassungen

Lernmaterialien für Amino Acids and Proteins an der Chinese University of Hong Kong

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What are aliphatic R groups?

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Non-polar and hydrophobic. 

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What are nonionic amino acids? 

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not ionised form. 

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How to read amino acid sequences?

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From N to C terminus. Carboxyl terminal is the amino acid with a carboxyl group available for another peptide bond. 

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How many types of B sheet conformation?

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Parallel b sheet and antiparallel b sheet. 2.  Hydrogen bonds between adjacent segments stabilize B conformation.

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Which of the two are more common in B turns. 

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Type I B turn with pro.

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What is pl?

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isoelectric ph. where net charge is 0.

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Protonated and deprotonated.

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ph<pKa  

ph>pka

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can the peptide bond rotate?

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Peptide bond is rigid and planar. C-N bond has double bond character due to resonance and cannot rotate freely.


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Which amino acids are the most common in B turns?

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Gly and Pro residues often occur in B turns. because gly is small and flexible.

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What is the Ramachandran diagram? 

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visual description of the combination of phi and psi dihedral angles that are permitted in a peptide backbone and those that are not permitted due to steric constraints. such as phi 90 and psi -90 is disfavored. 

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Which structure of proteins are most common?

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1/4 of amino acids in proteins are found in a helixes.

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How many types of a helix are there?

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2. Left handed and right handed. right handed a helix is common in proteins.

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Q:

What are aliphatic R groups?

A:

Non-polar and hydrophobic. 

Q:

What are nonionic amino acids? 

A:

not ionised form. 

Q:

How to read amino acid sequences?

A:

From N to C terminus. Carboxyl terminal is the amino acid with a carboxyl group available for another peptide bond. 

Q:

How many types of B sheet conformation?

A:

Parallel b sheet and antiparallel b sheet. 2.  Hydrogen bonds between adjacent segments stabilize B conformation.

Q:

Which of the two are more common in B turns. 

A:

Type I B turn with pro.

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Q:

What is pl?

A:

isoelectric ph. where net charge is 0.

Q:

Protonated and deprotonated.

A:

ph<pKa  

ph>pka

Q:

can the peptide bond rotate?

A:

Peptide bond is rigid and planar. C-N bond has double bond character due to resonance and cannot rotate freely.


Q:

Which amino acids are the most common in B turns?

A:

Gly and Pro residues often occur in B turns. because gly is small and flexible.

Q:

What is the Ramachandran diagram? 

A:

visual description of the combination of phi and psi dihedral angles that are permitted in a peptide backbone and those that are not permitted due to steric constraints. such as phi 90 and psi -90 is disfavored. 

Q:

Which structure of proteins are most common?

A:

1/4 of amino acids in proteins are found in a helixes.

Q:

How many types of a helix are there?

A:

2. Left handed and right handed. right handed a helix is common in proteins.

Amino Acids and Proteins

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