If statement forms P and Q are logically equivalent, then P Q is a tautology Conversely, if P Q is a tautology, then P and Q are logically equivalent Use to convert each of the logical equivalences to a tautology Then use a truth table to verify each tautology help_outlineCterminal catalytic domain of a subclass of Ubiquitinprotein ligase () It binds specific ubiquitinconjugating enzymes (E2), accepts ubiquitin from E2, transfers ubiquitin to substrate lysine side chains, and transfers additional ubiquitin molecules to the end of growing ubiquitin chains7 23ATypicalApplication Let Xand Ybe independent,positive random variables with densitiesf X and f Y,and let Z= XYWe find the density of Zby introducing a new random variable W,as follows Z= XY, W= Y (W= Xwould be equally good)The transformation is onetoone because we can solve for X,Yin terms of Z,Wby X= Z/W,Y= WIn a problem of this type,we must always Shutterstock Puzzlepix rP"V
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