  The coding and noncoding length sequences constructed from a complete genome
are characterised by multifractal analysis. The dimension spectrum $D_{q}$ and
its derivative, the 'analogous' specific heat $C_{q}$, are calculated for the
coding and noncoding length sequences of bacteria, where $q$ is the moment
order of the partition sum of the sequences. From the shape of the $% D_{q}$
and $C_{q}$ curves, it is seen that there exists a clear difference between the
coding/noncoding length sequences of all organisms considered and a completely
random sequence. The complexity of noncoding length sequences is higher than
that of coding length sequences for bacteria. Almost all $D_{q}$ curves for
coding length sequences are flat, so their multifractality is small whereas
almost all $D_{q}$ curves for noncoding length sequences are multifractal-like.
We propose to characterise the bacteria according to the types of the $C_{q}$
curves of their noncoding length sequences.
