The two amino acids having R groups with a negative net charge at pH 7.0 are ___________(a) Aspartate and glutamate(b) Arginine and histidine(c) Cysteine and methionine(d) Proline and valineI have been asked this question in homework.I would like to ask this question from Amino Acids topic in chapter Amino Acids, Peptides and Proteins of Biochemistry

The two amino acids having R groups with a negative net charge at pH 7

1.	The two amino acids having R groups with a negative net charge at pH 7.0 are ___________(a) Aspartate and glutamate(b) Arginine and histidine(c) Cysteine and methionine(d) Proline and valineI have been asked this question in homework.I would like to ask this question from Amino Acids topic in chapter Amino Acids, Peptides and Proteins of Biochemistry
Answer» The correct OPTION is (a) ASPARTATE and glutamate The best explanation: Aspartate:H3 N^+ – CH( CH2 COO^–) – COO^– Glutamate:H3 N^+ – CH( C2 H4 COO^–) – COO^–.

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