[modeller_usage] hydrogen atom name

Dear Sir,

I have question about the hydrogen atom name after building the all-atom model. After building the all-atom model, the hydrogen name "HA" means hydrogen bonded to C-alpha, but GLY has two HA, one is 1HA, the other is 2HA. Which one is correponding to the sidechain in other residue types? I checked several GLY in my model, I find always it is 2HA that is corresponding to the side chain of other residue type. Is this the standard criteria, or just modeller's choice?

Thank you very much!

-- Zhiqiang Ye PHD candidate