[mbreese]

The central dogma of molecular biology is:

    1) DNA is transcribed to RNA
    2) RNA is translated into protein
    3) Proteins do work

(This is a gross simplification, but is still a good working model)

In this case, the 10/10 are probably cell surface markers, which are proteins in a specific conformation (with possibly some other types molecules attached). And yes, one of their roles is touching and communication. So the important part for compatibility is that the DNA that ultimately makes those proteins match Amit's DNA. After that, you have made a pretty good match, so you are then just hoping that they are healthy in all other regards.

To use a programming analogy, the 10 markers could represent an Interface definition. Amit's blood has that Interface, but the underlying class has a severe bug. The donor's blood has the same Interface, but has a better implementation.