On the same structure mentioned before (condition being Magnesium
chloride, Bis-tris and PEG3350), I found these two blobs in equivalent
positions - both are close to the same lysine in differente chains,
but in one of them the density is almost contiguous (trying to model a
phosphate in this second one moved it close enough to the lysine as if
it was actually phosphorylated, which would be unlikely...).
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