I am studying music theory to become a better guitar player. I am currently a beginner who is studying the scales. I have hit a snag with some of the minor pentatonic scales. I am doing this on my own, no instructor and the internet of course is a bad place to find answers. Anyways I understand the minor pentatonic scale to be Root, b3, 4, 5, b7. When I got to the E minor pentatonic scale it doesn't seem to follow this format. It is R 3 4 5 7. How come its not E Gb A B Db E, instead of E G A B D E. Shouldn't the 3rd note be a flat along with the 5th?

I am sure the answer is easy but can some one shed some light onto this for me so I can please move on.

Thanks