Name two amino acids that contain negatively charged r groups lysine and histidine serine and threonine aspartate and glutamate isoleucine and methionine

Aspartate and Glutamate

Explanation:

There are different categories in the amino acids, one of them are the negative amino acids, characterized by having an carboxylic acid in the R group, that under the right conditions can be deprotonated and thus the amino acid will have negative charge. The two amino acids on this gu¿oup are glutamate and aspartate.

your answer is c) plasma

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