Watch the Taxin' 1 online guitar lesson by Joe Deloro from Blues Rock Road Trip 2
Phrase 1 is a 4 bar Q&A. Notice that motives 1 & 3 are primarily rhythmic (instead of melodic) due to note repetition. It's also a hybrid. The first motive recalls George Harrison's style, while the second one's based on Eric Clapton's. The lead guitar scale is D Pentatonic Minor: D,F,G,A,C,D (1,b3,4,5,b7,8).
Be sure to also learn the 4 bar variation in the TAB. Then you can play it after the original and move up to the 8 bar T&V period level.