1. Senescence and human chromosome changes

   • Margarete S. Mattevi
   • Francisco M. Salzano

   Original Investigations Pages: 1 - 8

2. Mammalian chromosome identification in interspecific hybrid cells using “Hoechst 33258”

   • R. S. Kucherlapati
   • I. Hilwig
   • F. H. Ruddle

   Original Investigations Pages: 9 - 14

3. Serum and tissue proteins in tuberous sclerosis

   • A. T. Rundle
   • J. Atkin
   • B. Sudell

   Original Investigations Pages: 15 - 22

4. Red cell enzyme polymorphisms in the Greek populations

   • G. Stamatoyannopoulos
   • A. Thomakos
   • E. R. Giblett

   Original Investigations Pages: 23 - 30

5. Cytogenetic studies in 12 patients with Itai-Itai disease

   • Yukimasa Shiraishi

   Original Investigations Pages: 31 - 44

6. HL-A Frequencies in Down's syndrome

   • David J. Segal
   • Joy W. Schlaut
   • John B. Dossetor

   Short Communications Pages: 45 - 48

7. Elliptocytosis: Linkage study in a family

   • F. Serville
   • J. Bentegeat
   • P. Verger

   Short Communications Pages: 49 - 51

8. First determination of the isozyme patterns of phosphoglycerate mutases (E.C. 2.7.5.3) and phosphoglycerate kinases (E.C. 2.7.2.3) in human tissues

   • R. A. Kamel
   • K. Berg
   • H. Wischerath

   Short Communications Pages: 53 - 55

9. Population genetics of human red cell phosphoclucomutase isozyme PGM₃ (E.C.: 2.7.5.1)

   • S. Bissbort
   • J. Kömpf
   • S. Gussmann

   Short Communications Pages: 57 - 58

10. Phenotypic distributions of red cell glutamate-pyruvate transaminase (E.C.2.6.1.2) isoenzymes in British and New York populations

    • S. G. Welch
    • P. R. Mills
    • R. E. Gaensslen

    Short Communications Pages: 59 - 62

11. Ring chromosome 13 in a polymalformed anencephalic

    • W. Schmid
    • J. P. Mühlethaler
    • H. Knechtli

    Clinical Case Reports Pages: 63 - 66

12. Familial inversion of chromosome No. 8

    • Atsuko Fujimoto
    • Miriam G. Wilson
    • Joseph W. Towner

    Clinical Case Reports Pages: 67 - 73

13. Diskussionsbemerkung zur Arbeit: Untersuchungen zum Polymorphismus der Galaktose-l-Phosphat-Uridyl-Transferase (EC: 2.7.7.12) mittels Agarosegelelektrophorese

    • H. Ritter

    Letters to the Editors Pages: 75 - 76

14. Schlußwort zu H. Ritters Brief an die Herausgeber

    • P. Kühnl
    • L. Nowicki
    • W. Spielmann

    Letters to the Editors Pages: 77 - 79