These incentives help drive down costs for developers who install fuel cells and ensure that developers can provide attractive, stable power rates to their fuel cell host customers.
The HIV retrovirus, in particular, is a single-stranded RNA virus that duplicates itself in a host cell by converting its genetic code into double-stranded DNA that is then inserted into the host cell.
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The host cell has no idea that its genetic code (which it generally needs to produce new, healthy cells) has been hijacked, for a long time at least, until the code has been copied and read to reproduce the virus many, many times by the host cell.
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It is capable of recognising the signature of cervical cancer and destroying the host cell when it is found.
DNA, which the host cell then unwittingly uses to make more viruses.
And, as a bonus, it is the protein that locks on to the surface of a host cell before the virus enters it.
To thrive, they latch onto a healthy host cell and hijack its reproductive machinery, cranking out copies of themselves and spinning off mutant versions that resist any one drug.
The viruses in question were retroviruses, which work by adding their genes to those of their host's cell nucleus.
Stem cell research is alive and well at a host of small companies and academic laboratories in the United States.
The Royal Society will host a meeting in London on stem cell research on Thursday and Friday.
Mr Obama repeated the claims of some scientists that embryonic stem cell research could lead to a cure for a whole host of diseases like Parkinson's, Alzheimer's and diabetes and that it could even help someone who is paralysed to walk again.
LONDON, England (CNN) -- A breakthrough in human embryonic stem cell research by scientists in South Korea has been hailed as ground-breaking, with the potential to fight a host of ailments, but some people have raised ethical concerns.
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