What probes are synthesised?
All those for known and predicted mRNAs.!
Why must you sequence the genome of other organisms?
Evolution studies
Vectors of diseases
Commercial
Model organisms
What do you see if you run a gel of total RNA?
Smear of mRNA (thousands of different sizes)
Two bright bands (28 s and 18 s) of rRNA
What is a gene chip?
Thin water of silicon carrying 1000s of nt probes
Oligonucleotides are synthesised directly onto surface of chip.
Hybridisation is electronically detected.