Biomolecular (DNA) computing is an emergent field lying at the crossroads
of computer science and molecular biology.  The main idea behind
biomolecular computing is that data can be encoded in DNA strands, and
techniques from molecular biology can be used to perform arithmetic and
logic operations.

I will address the computation language of a DNA-based system which is
defined as consisting of all the words (DNA strands) that can appear
during a computation. I will define properties of languages which ensure
that their words will not form undesirable bonds when used in DNA
computations, give several characterizations of the desired properties and
provide methods for obtaining languages with such properties.

Another approach to biomolecular computing is to study the information
processing capabilities of cellular organisms: How do cells and nature
"compute" and what can we learn from it? Cells read and "rewrite"  DNA all
the time, by processes that modify sequences at the DNA or RNA level. I
will discuss our research into the computational power of DNA
recombinations that take place during gene rearrangement in unicellular
protozoa. Our results indicate that, in principle, such organisms may have
the computational power of an electronic computer.