William H. Okamura

William H. Okamura publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where William H. Okamura sits on this spectrum.

William H. Okamura D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where William H. Okamura sits on this spectrum.

Research.com Recognitions

• 1998 - Fellow of the American Association for the Advancement of Science (AAAS)

Overview

Best Publications

• Identification of a specific binding protein for 1 alpha,25-dihydroxyvitamin D3 in basal-lateral membranes of chick intestinal epithelium and relationship to transcaltachia.

  I. Nemere;M.C. Dormanen;M.W. Hammond;W.H. Okamura

  427
  Citations

• Demonstration that 1 beta,25-dihydroxyvitamin D3 is an antagonist of the nongenomic but not genomic biological responses and biological profile of the three A-ring diastereomers of 1 alpha,25-dihydroxyvitamin D3.

  A W Norman;Roger Bouillon;M C Farach-Carson;J E Bishop

  258
  Citations

• Stimulation of phosphorylation of mitogen-activated protein kinase by 1alpha,25-dihydroxyvitamin D3 in promyelocytic NB4 leukemia cells: a structure-function study.

  Xinde Song;June E. Bishop;William H. Okamura;Anthony W. Norman

  180
  Citations

• Comparison of 6-s-cis- and 6-s-trans-locked analogs of 1alpha,25-dihydroxyvitamin D3 indicates that the 6-s-cis conformation is preferred for rapid nongenomic biological responses and that neither 6-s-cis- nor 6-s-trans-locked analogs are preferred for genomic biological responses.

  Anthony W. Norman;William H. Okamura;Marion W. Hammond;June E. Bishop

  180
  Citations

• Structural requirements for the interaction of 1 alpha, 25-(OH) 2- vitiamin D3 with its chick interestinal receptor system.

  D A Procsal;W H Okamura;A W Norman

  173
  Citations

• 1α,25-Dihydroxy-3-Epi-vitamin D3, a natural metabolite of 1α,25-dihydroxyvitamin D3, is a potent suppressor of parathyroid hormone secretion

  A.J. Brown;C. Ritter;E. Slatopolsky;K.R. Muralidharan

  149
  Citations

• 6.pi.-Electrocyclization of 1-Azatrienes to 1,2-Dihydropyridines

  David F. Maynard;William H. Okamura

  131
  Citations

• Structure-function studies of 1,25-dihydroxyvitamin D3 and the vitamin D endocrine system. 1,25-dihydroxy-pentadeuterio-previtamin D3 (as a 6-s-cis analog) stimulates nongenomic but not genomic biological responses.

  A W Norman;W H Okamura;M C Farach-Carson;K Allewaert

  125
  Citations

• Ligands for the vitamin D endocrine system: different shapes function as agonists and antagonists for genomic and rapid response receptors or as a ligand for the plasma vitamin D binding protein.

  Anthony W. Norman;Seiichi Ishizuka;William H. Okamura

  119
  Citations

• Studies on vitamin D and its analogs. VIII. Solution conformations of vitamin D3 and 1 alpha, 25-dihydroxyvitamin D3 by high-resolution proton magnetic resonance spectroscopy.

  Richard M. Wing;William H. Okamura;Albert Rego;Marcel R. Pirio

  118
  Citations

• Molecular tools for study of genomic and rapid signal transduction responses initiated by 1α, 25(OH)2-vitamin D3

  Anthony W. Norman;June E. Bishop;Craig M. Bula;Christopher J. Olivera

  116
  Citations

• Vitamin D: Concerning the Relationship Between Molecular Topology and Biological Function

  William H. Okamura;Anthony W. Norman;Richard M. Wing

  116
  Citations

• Profile of ligand specificity of the vitamin D binding protein for 1α,25-dihydroxyvitamin d3 and its analogs

  June E. Bishop;Elaine D. Collins;William H. Okamura;Anthony W. Norman

  116
  Citations

• Vitamin D in solution: conformations of vitamin D3, 1alpha,25-dihydroxyvitamin D3, and dihydrotachysterol3.

  Richard M. Wing;William H. Okamura;Marcel R. Pirio;Steven M. Sine

  113
  Citations

• Chemistry and conformation of vitamin D molecules

  William H. Okamura;M.Mark Midland;Marion W. Hammond;Noorsaadah Abd.Rahman

  113
  Citations

• 1,3,7,9,13,15-Hexadehydro[18]annulene

  William H. Okamura;Franz. Sondheimer

  110
  Citations

• An enantioselective central-axial-central chiral element transfer process leading to a concise synthesis of (+)-sterpurene: Intramolecular Diels-Alder reactions of vinylallene sulfoxides

  Richard A. Gibbs;Karin Bartels;Robert W. K. Lee;William H. Okamura

  105
  Citations

• Different shapes of the steroid hormone 1α,25(OH)2-vitamin D3 act as agonists for two different receptors in the vitamin D endocrine system to mediate genomic and rapid responses☆

  Anthony W. Norman;Helen L. Henry;June E. Bishop;Xin-De Song

  104
  Citations

• Studies of vitamin D (calciferol) and its analogs. 39. Arocalciferols: synthesis and biological evaluation of aromatic side-chain analogs of 1.alpha.,25-dihydroxyvitamin D3

  B. Figadere;A. W. Norman;H. L. Henry;H. P. Koeffler

  103
  Citations

• Rapid and genomic biological responses are mediated by different shapes of the agonist steroid hormone, 1α,25(oh)2vitamin d3

  A. W. Norman;Xinde Song;L. Zanello;C. Bula

  99
  Citations