What does Salmonella typhimurium and E. coli synthesize as part of their acidic tolerance response.

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#Question id: 156

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What is the N-terminal for the pentapeptide Val-Ile-Glu-Arg-Tyr?

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#Question id: 158

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At the isoelectric pH of a tetrapeptide:

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#Question id: 159

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The chirality of an amino acid results from the fact that its alpha carbon:

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#Question id: 160

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Of the 20 standard amino acids, only ___________ is not optically active.  The reason is that its side chain ___________.

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#Question id: 161

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Two amino acids of the standard 20 contain sulfur atoms.  They are:

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#Question id: 162

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All of the amino acids that are found in proteins, except for proline, contain a(n):