Calf-thymus DNA is widely used as DNA sample. Such as testing anti-dsDNA antibody activity, nuclease activity etc, as well as certain books include calf-thymus-DNA in various examples (such as the book Molecular biology by Weaver (ed-5) mentions in a table on % (G+C), that %(G+C) of calf-thymus DNA is 40)
Now; my question is; why a peculiar organ like thymus is selected (and not liver or kidney etc); and not any organ from adult cows (which are more available at any meat shop)? whereas all the otherly-situations should contain the same DNA-sequence? Isn't it a bit weird?
Is it more easy to extract the DNA from a calves' thymus gland?
I've searched web, but nothing helpful I found.