  We show that the $E_{11}$ representation that contains the space-time
translation generators also contains the rank two and five totally
anti-symmetric representations of $A_{10}$. By studying the behaviour of these
latter $A_{10}$ representations under SL(32), which we argue is contained in
the Cartan involution invariant sub-algebra of $E_{11}$, we find that the rank
two and five totally anti-symmetric representations must be identified with the
central charges of the eleven dimensional supersymmetry algebra.
