Page 106 - The Cell in 40 Topics

The Cell in 40 Topics

questions. The cell's flawless communication stems from its perfect design,
a manifestation of Almighty God's extraordinary creation.
Let us consider SH2, the module about which we possess the most in-
formation. This protein particle consists of two main sections. One part of
SH2 bonds tightly to the receptor tail; it is the second section that gives the
SH2 particles their fundamental property, that of working like a code-read-
ing device (Figure 85).
The number and sequence of the amino acids in the receptor tail forms
the coded message brought to the cell; only a form of SH2 module carries
out the binding by resolving this code. In this way, a special line of chemi-
cal communication is established between the cell membrane and the nu-
cleus. As you can now appreciate, all these complex processes are
regulated according to a specific coding system, not haphazardly. This
magnificent order is another sign that everything has been created in due
measure, and to be compatible with everything else.
In order to show another example of this exquisite harmony, let us
now consider the communications system that speeds into action to repair
injury whenever—for example—a person cuts his finger. In that event, a
messenger molecule called PDGF bonds to a smooth muscle cell receptor in
the damaged blood vessel. As a result of this attachment, the arm of the re-
ceptor within the cell attracts to itself a protein known as Grb2, a messenger
formed by the combination of SH2 and SH3 particles; it works like an adap-
tor to establish communication among proteins. In the wake of this, the
Grb2 attracts a messenger protein called sos, already present in the cyto-
plasm inside the cell, which contains an enzyme to it. sos sets in motion an-
other protein, ras. At the end of this sequence of processes, the command is
transmitted to the relevant genes inside the cell nucleus, and the cell begins
to divide, creating new tissue to heal the wound.
Based on the results of their research, scientists have arrived at the fol-
lowing interpretation: There exist mechanisms that automatically repair
any possible flaws in the cell's communications system. 15 These mecha-
nisms, the product of a superior creation, are far more advanced than any
control systems used in modern technology. In this way, hormones, recep-
tors, adaptors, proteins and microscopic particles have all been acting in
harmonious cooperation even since human beings were first created.

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