520+, for animal extracts of undetermined chemical constitution where the extracts are from parts of the reticuloendotheliel system.
SEE OR SEARCH CLASS
435, Chemistry: Molecular Biology and Microbiology, 68.1+, for methods of producing lymphokines by the culture of a micro-organism or animal or plant cell.
530, Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof,
351, for patents claiming a lymphokine, per se, the chemical modification of a lymphokine or the purification of a lymphokine.
930, Peptide or Protein Sequence,
140, 145 for Lymphokine peptide or protein sequences.