  We theoretically study the transport properties in the T-shaped
double-quantum-dot structure, by introducing the Majorana bound state (MBS) to
couple to the dot in the main channel. It is found that the side-coupled dot
governs the effect of the MBS on the transport behavior. When its level is
consistent with the energy zero point, the MBS contributes little to the
conductance spectrum. Otherwise, the linear conductance exhibits notable
changes according to the inter-MBS coupling manners. In the case of Majorana
zero mode, the linear conductance value keeps equal to $e^2\over 2h$ when the
level of the side-coupled dot departs from the energy zero point. However, the
linear conductance is always analogous to the MBS-absent case once the
inter-MBS coupling comes into play. These findings provide new information
about the interplay between the MBSs and electron states in the quantum dots.
