code: def protein_sequences_generator_to_dataframe(variant_and_protein_sequences_generator):
      
      return dataframe_from_generator(
          element_class=ProteinSequence,
          variant_and_elements_generator=variant_and_protein_sequences_generator,
          converters=dict(
              gene=lambda x: ";".join(x)))
docs: Given a generator which yields (Variant, [ProteinSequence]) elements,
      returns a pandas.DataFrame