Assignments of universal texture components for quark and lepton mass matrices

We reanalyze the mass matrix model of quarks and leptons that gives a unified description of quark and lepton mass matrices with the same texture form. By investigating possible types of assignment for the texture's components of this mass matrix form, we find that a different assignment for up quarks than for down quarks can lead to consistent values of the CKM mixing matrix. This finding overcomes a weak point in a previous analysis of the model. We also obtain some relations among the CKM mixing matrix parameters, which are independent of evolution effects.