moreover , the finding that after silica stimulation the amount of membrane-associated il-1 ( which was recently shown to be of the il-1 alpha type ) was low , while il-1 alpha in the culture fluid was clearly elevated , suggests that the il-1 alpha not attached to the cell membrane ( or released from it ) significantly contributes to the secreted il-1 pool .
C0600251
il-1 alpha
C0021755
il-1