[Chan]

Can anyone explain the chemical shifts of α,β and γ ¹³P in adenosine triphosphate (ATP)?
Ignore the phosphocreatine peak.

[Irlanur]

What would you accept as an explanation? The first and probably most important hint would be that the electron density nearly plays no role at all. The biggest influence comes from "paramagnetic shielding" terms.

[Babcock_Hall]

One helpful thing to keep in mind with phosphorus NMR is that groups in the gamma position tend to bring about an upfield shift.