1. Basic findings and current developments in sphingolipidoses

   • H. Pilz
   • R. Heipertz
   • D. Seidel

   Review Articles Pages: 113 - 134

2. The 8p^- syndrome

   • J. A. Reiss
   • P. M. Brenes
   • E. W. Lovrien

   Original Investigations Pages: 135 - 140

3. Clinical and ultrastructural heterogeneity of type IV Ehlers-Danlos syndrome

   • Peter H. Byers
   • Karen A. Holbrook
   • R. Brian Lowry

   Original Investigations Pages: 141 - 150

4. Digital ridge counts and genetic fields

   • D. F. Roberts
   • E. Coope

   Original Investigations Pages: 151 - 158

5. Sphingomyelinase activities in cultured skin fibroblasts from patients with Niemann-Pick disease

   • Ryoji Minami
   • Yoshiki Matsuura
   • Tooru Nakao

   Original Investigations Pages: 159 - 167

6. Satellite DNA and heterochromatin variants: The case for unequal mitotic crossing over

   • David M. Kurnit

   Original Investigations Pages: 169 - 186

7. PEP A⁹, a new, unstable variant in the peptidase a system

   • P. Kühnl
   • K. Anneken
   • W. Spielmann

   Original Investigations Pages: 187 - 191

8. Neuraminidase treatment reveals sialic acid differences in certain genetic variants of the Gc system (vitamin-D-binding protein)

   • Hartwig Cleve
   • W. Patutschnick

   Original Investigations Pages: 193 - 198

9. Detection of mycoplasma contamination in tissue cultures by fluorescence microscopy

   • Maya Thangavelu
   • H. Ernø
   • A. J. Therkelsen

   Original Investigations Pages: 199 - 202

10. The length of the Y chromosome in Nubian males and its location in metaphase spreads

    • Carlos E. Nasjleti
    • Charles J. Kowalski
    • Mohamed M. Nofal

    Original Investigations Pages: 203 - 205

11. Chromosome deletion [46,XX,del(20)(q11)] in agnogenic myeloid metaplasia

    • L. Findley
    • J. E. Kurnick
    • A. Robinson

    Clinical Case Reports Pages: 207 - 211

12. Ring chromosome 22 in a mentally retarded child and mosaic 45,XX,-15,-22,+t(15;22)(p11;q11)/ 46,XX,r(22)/46,XX karyotype in the mother

    • J. P. Fryns
    • H. Van den Berghe

    Clinical Case Reports Pages: 213 - 216

13. Partial duplication of the short arm of chromosome 10

    • J. P. Fryns
    • J. Deroover
    • H. Van den Berghe

    Clinical Case Reports Pages: 217 - 220

14. Prenatal diagnosis and postnatal follow-up of an abnormal child with two de novo apparentely balanced translocations

    • C. Stoll
    • Elisabeth Flori
    • R. Renaud

    Clinical Case Reports Pages: 221 - 224

15. Reply to: The use of racial admixture as evidence in intelligence research

    • Sandra Scarr
    • A. J. Pakstis
    • W. B. Barker

    Letters to the Editors Pages: 225 - 226