code: def from_sequence(chain, list_of_residues, sequence_type = None):
          '''Takes in a chain identifier and protein sequence and returns a Sequence object of Residues, indexed from 1.'''
          s = Sequence(sequence_type)
          count = 1
          for ResidueAA in list_of_residues:
              s.add(Residue(chain, count, ResidueAA, sequence_type))
              count += 1
          return f from_sequence(chain, list_of_residues, sequence_type = None):
          '''Takes in a chain identifier and protein sequence and returns a Sequence object of Residues, indexed from 1.'''
          s = Sequence(sequence_type)
          count = 1
          for ResidueAA in list_of_residues:
              s.add(Residue(chain, count, ResidueAA, sequence_type))
              count += 1
          return s
docs: Takes in a chain identifier and protein sequence and returns a Sequence object of Residues, indexed from 1.