Practice question

In cloning design, compatibility of cohesive termini determines insert-vector joining. Enzymes leaving identical 5' overhangs are mutually ligatable even if recognition sequences differ. SalI-hindII context implies need for compatible pair. EcoRI generates AATT overhang, BamHI generates GATC overhang, widely used in polylinkers. However, the question conceptualizes generation of compatible ends for diverse inserts, and EcoRI and BamHI represent standard non-compatible pair that illustrates strategy for directional cloning where two different ends prevent self-ligation. Their widespread availability and distinct sticky ends make them classic example for double-digestion planning in recombinant construction.