Building blocks 8- Proteins part 2

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8 Terms

1
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how are beta pleated sheets/strands formed?

when multiple strands are arranged side by side, sheets are formed

hydrogen bonds stabilise the structure

2
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how are tertiary structures stabilised?

hydrogen bonds

electrostatic interactions

hydrophobic interactions

3
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what are the two major classes of proteins?

fibrous

globular

4
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what are fibrous proteins?

they have little/no tertiary structure with crosslinks

they are mostly insoluble as non-polar groups are exposed

5
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what are globular proteins?

they are complex folded tertiary structures

non-polar groups are hidden so they are mostly water soluble

6
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what is the quaternary structure of a protein?

when a protein has more than one subunit and sometimes other functional elements

7
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what is the structure of haemoglobin?

4 chains

4 subunits

non-protein haem group binding an Fe2+

8
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what is sickle cell anaemia a result of?

a mutation in haemoglobin