AND or OR gene - protein logical relation in KEGG How do I know if it is a AND or OR relationship between genes associated with the same enzyme in KEGG? E.g., for EC:1.6.1.2 (http://www.genome.jp/dbget-bin/www_bget?ec:1.6.1.2) does the bacterium Streptomyces coelicolor (SCO) need SCO7622 AND SCO7623 or SCO7622 OR SCO7623?
The enzyme EC:1.6.1.2 is an NAD(P) transhydrogenase and consists of two subunits. The two subunits are encoded by two different genes pntA and pntB.

So in terms of computer logic I would say AND, both subunits are necessary for a functional NAD(P) transhydrogenase enzyme (EC:1.6.1.2).