Extended Data Fig. 3: Electron density map of DltB.
From: Crystal structure of a membrane-bound O-acyltransferase
a, Stereo experimental electron density map, using phases derived from an Au-SAD phasing (Extended Data Table 1). This 2Fo–Fc map is contoured at 1.0σ. DltB backbone tracing is shown in red. b, The final 2Fo–Fc electron density map of the crystal form II (Extended Data Table 1). This map is contoured at 1.0σ, shown in stereo and in an orientation approximately looking down the funnel. The catalytic His336 as well as His289 (another conserved residue (either His or Asn) among MBOAT proteins) are labelled. Both His336 and His289 are located at the bottom of the extracellular funnel, and sandwich the top opening of the transmembrane tunnel.
