Assertion: tryptophan | /r/HasProperty | added in an amount of about 0.1
Facets:
value: by weight
type: OTHER
value: to about 0.5%
type: OTHER
Source sentences:
text: In culturing the tryptophanase producing strain, since tryptophanase is an inducing enzyme, if tryptophan is added in an amount of about 0.1 to about 0.5% by weight to a culture medium, cultured cells having a high tryptophanase activity can be obtained.