1. Announcement

   Announcement Pages: 3 - 3

2. Genetic patterns of transcobalamin II and the relationships with congenital defects

   • Marijke Fràter-Schröder

   Review Pages: 5 - 31

3. Catalytic properties of porcine pancreatic elastase: a steady-state and pre-steady-state study

   • Paolo Ascenzia
   • Enea Menegatti
   • Eraldo Antonini

   Review Pages: 33 - 38

4. Lipid composition and catalytic properties of sarcoplasmic reticulum from normal and dystrophic chicken muscle

   • Ana M. Tovar
   • Sergio Verjovski-Almeida

   Review Pages: 39 - 48

5. Tubulin and tubulin-colchicine complex bind to brain microsomal membrane in vitro

   • Julio A. Rodriguez
   • Hector S. Barra

   Review Pages: 49 - 53

6. Lipid-bound sugars in malignant human breast tumors

   • Ana Rosa Santa Cruza
   • Luis A. Quesada Allue
   • Alberto Baldi

   Review Pages: 55 - 66

7. Phosphorylation increases α-bungarotoxin binding to acetylcholine receptor-enriched membrane preparations

   • M. E. Carstens
   • J. J. F. Taljaard
   • A. C. Neethling

   Review Pages: 67 - 71

8. Topography of the subunits of Micrococcus lysodeikticus F₁-ATPase

   • Alicia Mimbrera
   • Luis Rivas
   • Vicente Larraga

   Review Pages: 73 - 80

9. Isolation and characterization of copper-binding sites of human ceruloplasmin

   • K. S. Raju

   Review Pages: 81 - 88

10. Influence of protein net charge on the nucleic acid helix-destabilizing activity of various pancreatic ribonucleases

    • Antonella Carsana
    • Adriana Furia
    • Massimo Libonati

    Review Pages: 89 - 92