\mathit { \Gamma } _ { \alpha , \beta } ~ = ~ \mathrm { \sl ~ g } _ { \alpha + \beta } \, N _ { \alpha , \beta } \stingray\snake\lemur\zebra\left[ \stackrel { \wedge } { \psi } ^ { \dagger } , \stackrel { \wedge } { \psi } \right] = - \sigma _ { 3 }