Cis/trans regulation

Fig. 6.5(a) OR gene expression. M, maternal and P, paternal DNA strands 1 2, chromosomes from neurones with differential cis/trans regulation (M/P) of each DNA strand (from Chess et al., 1998). [ = OR gene locus = suppressed regulatory element]... 

Furthermore, the two isomeric butenylnickel(II) forms of the active catalyst complex, the anti and syn forms, can differ in their reactivity depending on the catalyst structure. The key to understanding the cis-trans regulation lies in the different reactivities of the anti- and syn-butenylnickel(II) forms of the active catalyst complex, both in relation to their interconversion and together with the associated anti-syn equilibrium. 

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