In both Jazz and Blues playing, it is common to combine the sounds of the Blues scale and the dominant 7th arpeggio. Most of the notes of the arpeggio (1, 5, b7) are also contained in the Blues scale. The natural third degree of the arpeggio (3) is not in the Blues scale. This note is an important one because it tells you whether the chord is major or minor. It is common to go from the flattened third to the natural third in the one lick, as demonstrated in this solo.