The storage of memories in cells is rarely thought of on the
protein level of the cell. Cells are usually given a
developmental state, but no memory. A cell may become a liver
cell, cancerous, or diabetic, but this is not memory, but a
physiological change in the cell which is usually not reversible
to a previous state. For example cancer treatments are entirely
focused on identifying the cancerous cells and killing them.
Internally the genomes of cancer cells often have deletions and
duplications. They are cancerous, they have not learned to be
cancerous. Though not as dramatic, it is now thought that
cellular differentiation which creates different types of cells
is heavily influenced by epigenetic modification of the genome;
the DNA is marked by methyl groups which dictates the state of
the cell by modifying the gene. This is mediated by proteins for
sure, but is quite complex and not well understood at this time.
Epigenetic markers can even change gene behavior between
generations of offspring as well, th