  We construct the holonomy-flux operator algebra in the recently developed
spinor formulation of loop gravity. We show that, when restricting to
SU(2)-gauge invariant operators, the familiar grasping and Wilson loop
operators are written as composite operators built from the gauge-invariant
`generalized ladder operators' recently introduced in the U(N) approach to
intertwiners and spin networks. We comment on quantization ambiguities that
appear in the definition of the holonomy operator and use these ambiguities as
a toy model to test a class of quantization ambiguities which is present in the
standard regularization and definition of the Hamiltonian constraint operator
in loop quantum gravity.
