With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: To Kill a Mockingbird (film) was Robert Duvall's television debut.
text_B: In enzymology , an adenosylhomocysteine nucleosidase is an enzyme that catalyzes the chemical reaction. enzymology. enzymology. enzyme. enzyme. catalyzes. catalysis. chemical reaction. chemical reaction. S-adenosyl-L-homocysteine + H2O S - -LRB- 5-deoxy-D-ribos-5-yl -RRB- - L-homocysteine + adenine. S-adenosyl-L-homocysteine. S-adenosyl-L-homocysteine. adenine. adenine. Thus , the two substrates of this enzyme are S-adenosyl-L-homocysteine and H2O , whereas its two products are S - -LRB- 5-deoxy-D-ribos-5-yl -RRB- - L-homocysteine and adenine .. enzyme. enzyme. substrates. substrate ( biochemistry ). S-adenosyl-L-homocysteine. S-adenosyl-L-homocysteine. products. product ( chemistry ). adenine. adenine. This enzyme belongs to the family of hydrolases , specifically those glycosylases that hydrolyse N-glycosyl compounds .. enzyme. enzyme. The systematic name of this enzyme class is S-adenosyl-L-homocysteine homocysteinylribohydrolase .. enzyme. enzyme. S-adenosyl-L-homocysteine. S-adenosyl-L-homocysteine. systematic name. List of enzymes. Other names in common use include S-adenosylhomocysteine hydrolase -LRB- ambiguous -RRB- , S-adenosylhomocysteine nucleosidase , 5 ' - methyladenosine nucleosidase , S-adenosylhomocysteine / 5 ' - methylthioadenosine nucleosidase , and AdoHcy / MTA nucleosidase .. hydrolase. hydrolase. This enzyme participates in methionine metabolism .. enzyme. enzyme. methionine metabolism. methionine metabolism
not_related.