Assertion: asparagine | /r/CapableOf | play key role
Facets:
value: in the active site of enzymes
type: LOCATION
value: frequently
type: TEMPORAL
Source sentences:
text: Although it lacks the negative charge of the free carboxylic acid group of aspartate, asparagine retains some polarity and frequently plays a key role in the active site of enzymes ( Mansfield et al. , 2006 ).