Biology Reference
In-Depth Information
Fig. 12.13 A comparison between a
molecular spectrum
and an “RNA spectrum” (or “ribonic
spectrum”). (a) The Raman spectrum of PCl
4
VOCl
4
(tetrachlorophosphonium oxotetrachloro-
vanadate) indicates the probability of the vibrational transitions within the molecule as a function
of the vibrational energies expressed in the units of
wavenumbers
(Reproduced from Rold´n et al.
2004). (b) An example of the “ribonic spectrum” indicating the probability of observing various
RNA trajectories (ribons) represented by node
numbers
the transitions among the electronic, vibrational, and/or rotational levels within
molecules. In contrast, the
y
-axis of RNA spectrum measures the number of RNA
molecules whose trajectories have similar shapes,
regardless of the underlying causes
.
In other words, molecular spectroscopy deals with
dynamics
, and RNA spectroscopy
(or “ribonoscopy”) is concerned with
kinematics
(see Row 8, Table
12.5
), the two
