Use the following conceptual models to answer questions about protein arrangement: H.Pho- hydrophobic side chain (+)- positively charged side chain (-)- negatively charged side chain P- polar side chain Redraw each of the amino acid chains as if they were placed in an aqueous solution. (3pts) Key:
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- H.Pho (hydrophobic side chain): These side chains are nonpolar and tend to avoid water. They are usually found buried inside the protein structure. - +)- (positively charged side chain): These side chains are polar and have a positive charge. They can form Show more…
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Match these for side chain / R groups lonize at cell pH, hydrophilic as they attract opposite proline Not ionized, but hydrophilic, so they attract other charged or polar side chains Glycine cysteine Hydrophobic, so cluster inside protein, away from water Charged Forms S-S disulfide bridge, stabilize protein shape Nonpolar Side chain is H (also has H attached to central carbon) Polar Ring structure affect hydrogen bonds and where protein bends
Katlin K.
On this diagram of an amino acid, clearly label: a) the R group (or side chain) b) the α-carbon c) the amino group d) the carboxyl group In the space below, re-draw the amino acid as you expect it would be found in water (remember: inside a cell, molecules are in water). Hint: think about functional groups that tend to become ionized:
Shyam P.
Name and draw the side-chain of one amino acid from each of the following categories: non-polar, aromatic, polar uncharged, basic (+ve charge at pH 7), and acidic (-ve charge at pH 7). Question 2: Amino acids from which of the following 5 categories: non-polar, aromatic, polar uncharged, basic (+ve charge at pH 7), and acidic (-ve charge at pH 7) are more likely to be found on the inside of a water-soluble protein? (Note that there may be more than one category involved, so you should list all relevant categories). Explain the reasons for each of your choices.
Kaden B.
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