530 / | HD | CHEMISTRY: NATURAL RESINS OR DERIVATIVES; PEPTIDES OR PROTEINS; LIGNINS OR REACTION PRODUCTS THEREOF |
350 | DF | PROTEINS, I.E., MORE THAN 100 AMINO ACID RESIDUES {14} |
412 | DF | .~ Separation or purification {6} |
422 | DF | .~.~ Solvent extraction {2} |
423 | .~.~.~ Oxygenated material {2} | |
424 | DF | .~.~.~.~> Alcohol |
425 | DF | .~.~.~.~> Carboxyl containing |