And we believe that heparin plays a role in immune lead, plays a role in actually helping our body fight off infectious agents. On top of that, heparin also acts as an anticoagulant. So this is what the structure of that repeating disaccharide unit in Heparin actually looks like. So on the first sugar, we have the carboxylate group that bears a negative charge and the sulfate group that also bears a negative charge. On the second unit, the second sugar of this disaccharide unit, we also have this sulfate group attached to this carbon, as we have in this particular case. And we have the amino group that also contains this sulfate.