TY - RPRT TI - High sensitivity electron diffraction analysis. A study of divalent cation binding to purple membrane. AU - A K Mitra AU - R M Stroud PY - 1990 DO - 10.1016/s0006-3495(90)82532-7 UR - https://pubmed.ncbi.nlm.nih.gov/2317552/ ID - 2317552 ER -