I'd say at least 1.0-1.2 g/lb will put you in a good place. There isn't a definitive guideline on it and most guidelines for adults are either for endurance trained athletes or untrained sedentary individuals. So you won't find a good solid reference on this. I'd start there and see where it goes. If you find yourself struggling, shoot me an email and I'm happy to work with you on a more specific plan.