Sawicki D L, Erlanger B F, Beiser S M
Science. 1971 Oct 1;174(4004):70-2. doi: 10.1126/science.174.4004.70.
Rabbits immunized with bovine serum albumin conjugates of 5-bromouracil, 5-iodouracil, and 6-methyladenosine produced antibodies specific for the bases. These antibodies were used to detect immunochemically 5-bromouracil and 6-methyladenosine in denatured DNA.