Watch the Example 17 online guitar lesson by Brad Carlton from Guitar Lab: Boogie-Woogie
This is an example of step-wise motion in voices 1 through 3 out of the A mixolydian mode. The chords are A7, D/A. Em/A (A9 no 3rd) and back to D/A. I will compare this example with example 16 to demonstrate how one note changes the sound and would affect your thought process when soloing.