Assertion: peptide's amino acid | /r/HasProperty | coupled to coupled amino acid
Facets:
value: previously
type: TEMPORAL
Source sentences:
text: An amino acid is coupled to the deprotected N-terminal amine of the resin, or previously coupled amino acid, using a coupling mixture such as the protected amino acid (3 eq), PyBOP (3 eq), HOBt (3 eq), and DIPEA (6 eq) in 1:1 DCM:DMF until the resin is negative to ninhydrin.