 B. Shaanan

B. Shaanan determined a human oxyhemoglobin structure by single-crystal X-ray crystallography in a 1983 paper bearing that exact single-author byline. The experiment used an Arndt–Wonacott camera at $-2{}^{\circ }\mathrm{C}$ and reported a resolution of $2.1\mathring{\mathrm{A}}$.^[ref] It supplied an experimental arrangement against which molecular explanations of hemoglobin oxygen binding could be tested.

The paper distinguished the local environments in the alpha-globin and beta-globin subunits and specified iron positions relative to defined porphyrin planes. Shaanan also coauthored the later deoxyhemoglobin study with G. Fermi, Max Perutz and R. Fourme.^[ref] Comparing the two ligation states requires consistent geometric definitions; distances from different reference planes are different observables.

An original plane-fitting example makes that distinction concrete. A point at coordinate $z=0.30$ angstrom is 0.30 angstrom from the plane $z=0$, but only 0.10 angstrom from the parallel plane $z=0.20$ angstrom. The atom has not moved. Changing the atoms used to define a fitted plane can change a reported displacement.

For a unit normal $\mathbf{n}$ and point $\mathbf{p}$ on a reference plane, signed distance from position $\mathbf{r}$ isReversing the normal reverses the sign; translating both the model and its plane by the same vector leaves $d$ unchanged. These are geometric checks for interpreting a structural comparison, not additional measurements from the paper.

The value of the structural work is therefore more specific than an image of a protein: it turns questions about oxygen-binding geometry into quantities with stated reference conventions and experimental support. The published initials are retained rather than assuming a full identity from a similarly named crystallographer.