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Structure and Properties of Peptides

Structure and Properties of Peptides
Heme is the binding pocket of myoglobin and hemoglobin and is composed of

hydrophobic residues
negatively charged residues
polar residues
positively charged residues

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Structure and Properties of Peptides
If the F and Y angles of each peptide unit in a protein are known, which of the following may also be determined?

Complete tertiary structure
Complete secondary structure
Thermodynamic stability
Complete quaternary structure

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Structure and Properties of Peptides
An oil drop with a polar coat is a metaphor referring to the three dimensional structure of

fibrous proteins
globular proteins
collagen
silk protein

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Structure and Properties of Peptides
The major element of secondary structure in myoglobin and hemoglobin is

All of these
the P-strand
the reverse turn
the a-helix

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Structure and Properties of Peptides
The heme is held in place by a bond between

the Fe3+ and histidine
the Fe3+ and cysteine
the Fe2+ and cysteine
the Fe2+ and histidine

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Structure and Properties of Peptides
In β-pleated sheet structures neighbouring

neighboring residues are hydrogen bonded
neighboring chains are hydrogen bonded
neighboring chains are connected by a-helices
chains lie in a flat plane

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