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#1
03-10-2013, 02:16 PM
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 The third amino acid in the peptidoglycan cross-linking tetra-peptide chain? The third amino acid in the peptidoglycan cross-linking tetra-peptide chain is either diaminopimelic acid, or lysine. These amino acids are located in this position because the amino acid must: Answer Be positively charged for a salt bridge to form. Have two free amino groups. Be hydrophilic. Have a large R-side chain to fill space in the cell wall. All of the above are required.  |
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| acid , amino , chain , crosslinking , peptidoglycan , tetrapeptide |
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