Human DNA on a computer hard disk

Leonard Bardi bardi at altavista.net
Mon May 11 12:49:25 EST 1998

I am a student in Information Systems at the university of Geneva.

I'd like to know how many hard disk space would be necessary to store a
entire human genome.

If I have well understood, in all our 46 chromosomes we have 3 * 10^9
bases. Each base is an A, C, G or T.

Are they other elements that should be stored? Would it be enough?

So, a human genome would take less than 1 GB disk space :
    - 4 letters can be encoded on 2 bits
    - 2 * (3 * 10^9) / 8 / 1024 / 1024 =  715 MB

Is that right ???

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