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Structure and Properties of Peptides

Structure and Properties of Peptides
Which hemoglobin chain replaces the beta chain in embryonic hemoglobulin?

Gamma
Alfa
Delta
Epsilon

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Structure and Properties of Peptides
The oxygen in hemoglobin and myoglobin is bound to

lysine residues in the protein
the iron atom in the heme group
histidine residues in the protein
the nitrogen atoms on the heme

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

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

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Structure and Properties of Peptides
The resonance structures that can be drawn for the peptide bond indicate that the peptide bond

is stronger than an ordinary single bond
both (a) and (b)
has partial double bond character
is still not completely understood

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Structure and Properties of Peptides
When pO2 = Kd of myoglobin, the fractional saturation (YO2) is about

1.7
0.5
0.1
0.9

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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

silk protein
globular proteins
collagen
fibrous proteins

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