The thymus is an organ in the upper chest, which all mammals
have. The calf thymus is a thymus that belongs to a calf. Calf
thymus DNA, is the DNA that can be isolated from this calf thymus.
Calf thymus DNA is used for many experiments, because the thymus
has a very high yield of DNA (calf thymus DNA has a yield of
approx. 2.542% (w/w))