A new patent dispute - the New York-based Enzo Biochern Inc vs Calgene Inc - is expected to tie the US judiciary into knots. Calgene's technique for genetically altering its Flavr Savr tomatoes (Down To Earth, Vol 3, No 4) has been called into question in a federal court case in Wilmington, Delaware, by Enzo, which claims that it was based on fraudulent research. Calgene was tightlipped on the issue.