MODRES 4HVP ABA A 67 ALA ALPHA-AMINOBUTYRIC ACID MODRES 4HVP ABA A 95 ALA ALPHA-AMINOBUTYRIC ACID MODRES 4HVP ABA B 67 ALA ALPHA-AMINOBUTYRIC ACID MODRES 4HVP ABA B 95 ALA ALPHA-AMINOBUTYRIC ACID