An apparatus may include a sense amplifier with a single column select transistor, a local input/output line selectively couplable to a first bit line through the column select transistor, and a read/write gap comprising at least a first transistor and a second transistor. The first transistor may be couplable to a read select signal and a complimentary local input/output line and the second transistor is couplable to the complimentary local input/output line and a global input/output line.