Assertion: serotonin | /r/HasProperty | absent
Facets:
value: in conus venoms
type: LOCATION
value: in humans
type: OTHER
value: previously
type: TEMPORAL
value: normally
type: DEGREE
value: in mast cells
type: LOCATION
Source sentences:
text: Mast cells in rodents are described to be an important source of serotonin, while in humans, serotonin is normally absent in mast cells (or at least found in very low concentrations).
text: Loneliness and depression are present when serotonin is absent.
text: Although serotonin has been reported in arthropod venoms, it was previously reported to be absent in Conus venoms.