With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Leonardo da Vinci painted during the Renaissance.
text_B: In biochemistry , a synthase is an enzyme that catalyses a synthesis process .. biochemistry. biochemistry. enzyme. enzyme. synthesis. Biosynthesis. Following the EC number classification , they belong to the group of ligases , with lyases catalysing the reverse reaction .. EC number. Enzyme Commission number. Note that , originally , biochemical nomenclature distinguished synthetases and synthases .. Under the original definition , synthases do not use energy from nucleoside triphosphates -LRB- such as ATP , GTP , CTP , TTP , and UTP -RRB- , whereas synthetases do use nucleoside triphosphates .. However , the Joint Commission on Biochemical Nomenclature -LRB- JCBN -RRB- dictates that ` synthase ' can be used with any enzyme that catalyzes synthesis -LRB- whether or not it uses nucleoside triphosphates -RRB- , whereas ` synthetase ' is to be used synonymously with ` ligase ' .. enzyme. enzyme. synthesis. Biosynthesis. ligase. ligase. synthetase. synthetase
not_related.