Backdoor

E|-5--4--------------------------5--4----------------------------------------|
B|-------2-------2--3--2---------------2---------2--3--2---------------------|
G|-----------------------4--2--1-------------------------4--2--1-2-----------|
D|---------------------------------------------------------------------------|
A|---------------------------------------------------------------------------|
E|---------------------------------------------------------------------------|

i think the bass is playing these root notes:
G|---------|
D|---------|
A|---4---4-|
E|-2---5---|