The endomembrane system functions to make ATP.
is present in prokaryotes.
does not exist in plant cells.
includes the Golgi apparatus and the endoplasmic reticulum.
includes the endoplasmic reticulum and the nucleus.

You are studying a protein that you call protein x. there is an aspartic acid at a key position in protein x which is important in the folding and stabilization of that protein. if this aspartic acid is changed to a different amino acid, which type of amino acid substitutions is most likely to allow the protein to fold normally?