US PATENT SUBCLASS 930 / DIG 784
.~ The first amino acid contains the same number of amino and carboxylic acid or derivative groups (neutral) (C07K-5/10A)


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930 /   HD   PEPTIDE OR PROTEIN SEQUENCE

DIG 780  DD  TETRAPEPTIDES (DERIVED FROM ONLY FOUR AMINO ACIDS) (C07K-5/10) {6}
DIG 784.~ The first amino acid contains the same number of amino and carboxylic acid or derivative groups (neutral) (C07K-5/10A) {2}
DIG 785  DD  .~.~> And aliphatic (C07K-5/10A1)
DIG 786  DD  .~.~> And carbocyclic ring (Phe) (C07K-5/10A2)