Page 144 - The Miraculous Machine that Works for an Entire Lifetime: Enzyme

Harun Yahya

That enzyme, called the Stuart factor, cleaves and activates pro-

thrombin. But what applies to thrombin also applies to Stuart factor.
Were it to be moving actively in the blood right from the outset, then in
that case, the Stuart factor would constantly initiate the clotting mech-
anism and uncontrolled clotting would also begin. For that reason,
Stuart factor also exists in an active state while circulating in the blood.
However, Stuart factor by itself is not enough for prothrombin to
be set into action. Still another enzyme, accelerin, works with it to con-
vert prothrombin into thrombin.
We might therefore assume that accelerin is also initially not in an
active state. However, its activation system involves a puzzle reminis-

cent of the riddle of "the chicken and the egg"—because it is thrombin
that activates accelerin! How do we explain the fact that accelerin is ac-
tivated by the very enzyme that it itself activates?
The reason is that Stuart factor cleaves the prothrombin at a very
low rate. The result is that as a precautionary measure, a certain
amount of thrombin is always ready in the body. The whole phenome-
non begins with this significant precaution and as the Stuart factor goes
into action, the clotting system also goes into action at high speed.
This system of various factors enables blood clotting to take place.
The enzymes must know which have to go into action when, where
they need to concentrate, and what gap in the body they have to cover
over. They also need to know when to stop their work. If the clotting

process that begins over a wound does not stop at the proper stage, this
will constitute a serious danger for the body. Uncontrolled clotting will
mean blood vessel congestion, and vital organs will fail to function. It
is therefore essential to halt the activities of these enzymes that consec-
utively activate one another. Yet other enzymes inform them of this.
Once the wound has healed, the blood clot also needs to be re-
moved. The molecules that arrive on the scene for this task are, again,
enzymes. The one known as plasmin works like a pair of scissors to cut

142