Question: On what topic did James Watson and Alex Stokes have papers published in "Nature" on 25 April 1953?
Sentence (from "James Watson"): James Dewey Watson (born April 6, 1928) is an American molecular biologist, geneticist and zoologist, best known as one of the co-discoverers of the structure of DNA in 1953 with Francis Crick and Rosalind Franklin.
Relevant evidence: Yes