Recombinational cloning using engineered recombination sites

Compositions and kits are provided for recombinational cloning. One composition comprises at least one isolated recombination protein and at least one isolated nucleic acid molecule comprising at least a first recombination site containing at least one mutation, wherein said mutation removes one or more stop codons from said recombination site. Another composition comprises at least one isolated recombination protein and at least one nucleic acid molecule comprising at least a first nucleic acid sequence selected from the group consisting of SEQ ID NOs:1-16, a complementary DNA sequence thereto, and an RNA sequence corresponding thereto. A further composition comprises at least one isolated recombination protein and at least one isolated nucleic acid molecule comprising at least a first recombination site containing at least one mutation, wherein said mutation avoids hairpin formation. Other compositions are as further defined in the claims.