  Recent lattice results on Dirac low-mode removed $J=1,2$ mesons and
$J=\frac{1}{2}$ baryons reveal the appearance of a new $SU(4)$ symmetry of
confinement. Here the degeneracy of all $J=2$ iso-vector states within an
irreducible representation of $SU(4)$ after low-mode removal is demonstrated.
The $SU(4)$ symmetry contains $SU(2)_L \times SU(2)_R$ and $U(1)_A$ symmetries
as subgroups and mixes all compontents $u_L,u_R,d_L,d_R$ of the two-flavor
Dirac field. It implies the vanishing of the interaction of quarks with the
color-magnetic field, which is shown by using the QCD Hamiltonian in Coulomb
gauge.
