1. A study of chromosomal organization of repetitive DNA sequences byin situ hybridization

   • M. T. Vlad
   • V. A. Hilder

   Papers Pages: 721 - 738

2. Cytochemical properties of euchromatin and heterochromatin

   • Maria Luiza S. Mello

   Papers Pages: 739 - 751

3. Detection of gonadotrophic hormones on isolated granulosa cells of the domestic hen, Gallus domesticus, by an immunohistochemical method

   • A. B. Gilbert
   • Maida F. Davidson
   • J. W. Wells

   Papers Pages: 753 - 761

4. The influence of embedding media and fixation on the post-embedment ultrastructural demonstration of complex carbohydrates. I. Morphology and periodic acid-thiocarbohydrazide-silver proteinate staining of vicinal diols

   • G. N. Thomopoulos
   • B. A. Schulte
   • S. S. Spicer

   Papers Pages: 763 - 784

5. Evidence for collagen molecular orientation in basement membranes

   • L. C. U. Junqueira
   • G. S. Montes
   • R. R. Brentani

   Papers Pages: 785 - 794

6. The immunoelectronmicroscopic localization of human platelet factor 4 in tissue mast cells

   • Kathryn M. McLaren
   • D. S. Pepper

   Papers Pages: 795 - 800

7. Cuprolinic Blue: a specific dye for single-stranded RNA in the presence of magnesium chloride. I. Fundamental aspects

   • Johan Tas
   • Dan Mendelson
   • Cornelis J. F. Noorden

   Papers Pages: 801 - 814

8. Acid phosphatase activity of human gingival fibroblasts measured using a simultaneous coupling semi-permeable membrane technique

   • R. Duguid
   • L. M. A. Rumgay

   Papers Pages: 815 - 824

9. Use of epoxy resin slides for handling unfixed cryostat sections intended for histochemistry at the ultrastructural level

   • F. A. Von Bülow
   • P. E. Høyer

   Short Communication Pages: 825 - 827

10. News and views

    • Peter J. Stoward

    News Pages: 829 - 830