  Take the matrix Lie superalgebra $gl_{N|N}$ with the standard generators
$E_{ij}$ where $i,j=-N,...,-1,1,...,N$. Define an involutive automorphism of
$gl_{N|N}$ by sending $E_{ij}$ to $E_{-i,-j}$. Then the corresponding twisted
subalgebra $g$ in the polynomial current Lie superalgebra $gl_{N|N}[u]$, has a
natural Lie co-superalgebra structure. Here we quantise the universal
enveloping algebra $U(g)$ as a co-Poisson Hopf superalgebra. For the quantised
algebra we give a description of the centre, and construct the double in the
sense of Drinfeld. We also construct a class of irreducible representations of
the quantised algebra, by introducing an appropriate analogue of the degenerate
affine Hecke algebra.
