David Dooling has an entertaining take on the Helicos genome sequence I discussed yesterday entitled “Another rich white guy sequences own genome”.
I noted in my post yesterday that the alleged price drop for the Helicos sequence over current technologies was an illusion, but David includes a much more thorough analysis of the relative genome sequencing costs thrown around over the last couple of days and makes it very clear that the price Helicos is quoting is really no advance over the current prices for second-generation sequencing technologies:
They report reagent costs that are on par with current second generation technology fully loaded costs (which are closer to $50,000, not the $250,000-$500,000 they report in their letter). Yes, you read that right, their reagent costs alone are on par with reagents, instrument depreciation, personnel, and IT infrastructure for second generation platforms. Quake does report in an interview that the amortized equipment cost was $10,000-$20,000. Assuming a straight line depreciation for the Helicos instrument, a $10,000-$20,000 depreciation over four one-week runs yields a $125,000-$250,000 annual depreciation. Their first instrument was sold for $963,000 and they subsequently lowered the price by 25%. So assuming their price now is $725,000 and the residual value of the instrument is $0 (not a bad assumption given the pace of change in this industry), they are estimating a life of their instrument of about three to six years. Again due to the pace of change of this industry, even three years may be generous.
It’s a real shame that reporters who should have known better (e.g. Nicholas Wade
), as well as the reviewers on the paper
, allowed Quake to get away with the claim that the cost of a Helicos sequence represents a genuine improvement over the current state of the art. As for the pointless comparison between the cost of the first ever genome sequence
and the Helicos effort (courtesy Gizmodo, headline “Genome Sequencing Gets 99.9833% Price Cut
“) – well, the less said about that the better.