They found that the DNA methylations in the four genes in question increased, depending on the donor's age. (sciencedaily.com)
But that project looked at only small sections of the mouse genome on one chromosome where the mutant gene in question, Vkorc1, was known to exist. (sciencedaily.com)
Then, the other miners would be able to «verify the sequence by sequencing a segment that includes the same locations [on the gene in question] or finding a previously sequenced value which, when hashed, matches the POW value.» (ethnews.com)