Assertion: mutation | /r/HasProperty | their requirement
Facets:
value: in their growth medium
type: LOCATION
value: experimentally
type: MANNER
value: for pantothenic acid
type: CAUSE
Source sentences:
text: This gene is necessary for the synthesis of pantothenic acid (vitamin B5), and mutants defective in this gene can be experimentally identified by their requirement for pantothenic acid in their growth medium.