Page 37 - The Miraculous Machine that Works for an Entire Lifetime: Enzyme

Adnan Oktar

never seen each other, the moment they meet inside a volume many bil-

lions of times larger than themselves, they can distinguish each anoth-
er from among a very large number of molecules and bind together.
One of the main features that permits this bonding to occur is the
enzyme's tertiary structure. The molecule that bends and assumes its
own special three-dimensional shape possesses a gap of highly com-
plex geometry into which the substrate will fit perfectly. The active site
and the substrate fit together just like a lock and a key. In the absence
of the key—the enzyme, in other words—the door can be opened only
by forcing it, which inside the human body is impossible because of the
high level of energy that would be required.
In the same way that any single lock can only open a single door,

products
substrate
active site

Substrate binds enzyme/substrate enzyme/product Product leaves the
to the active site. complex complex active site.

substrate=H O 2
2
active site
substrate
active site

molecular shape of the enzyme catalase schematic appearance of enzyme

The enzyme and substrate fit each other like a lock and key. In the same way that a sin-
gle key opens a single door, so specific enzymes will fit only specific substrates.

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