With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The fleshy petals of jackfruit flowers form the fruit.
text_B: Nucleoside-specific porin -LRB- the tsx gene of Escherichia coli -RRB- is an outer membrane protein , Tsx , which constitutes the receptor for colicin K and Bacteriophage T6 , and functions as a substrate-specific channel for nucleosides and deoxy-nucleosides .. Escherichia coli. Escherichia coli. colicin. colicin. Bacteriophage T6. Bacteriophage T6. nucleosides. nucleosides. < ref. name = `` PUB00006257 '' > < / ref> The protein contains 294 amino acids , the first 22 of which are characteristic of a bacterial signal sequence peptide .. Tsx shows no significant similarities to general bacterial porins .. general bacterial porins. General bacterial porin family
not_related.