1. Human mitochondrial DNA types in Finland

   • Johanna Vilkki
   • Marja-Liisa Savontaus
   • Eeva K. Nikoskelainen

   Original Investigations Pages: 317 - 321

2. Similar molecular deletions on chromosome 15q11.2 are encountered in both the Prader-Willi and Angelman syndromes

   • T. A. Donlon

   Original Investigations Pages: 322 - 328

3. Galactosialidosis: molecular heterogeneity in biosynthesis and processing of protective protein for β-galactosidase

   • Eiji Nanba
   • Akihiko Tsuji
   • Yoshiyuki Suzuki

   Original Investigations Pages: 329 - 332

4. Blastomere karyotyping and transfer of chromosomally selected embryos

   • C. Bacchus
   • W. Buselmaier

   Original Investigations Pages: 333 - 336

5. The gene for X-linked progressive mixed deafness with perilymphatic gusher during stapes surgery (DFN3) is linked to PGK

   • Han G. Brunner
   • Cor A. van Bennekom
   • Hans-Hilger Ropers

   Original Investigations Pages: 337 - 340

6. Familial amyloidotic polyneuropathy: transthyretin (prealbumin) variants in kindreds of Italian origin

   • Maria João Mascarenhas Saraiva
   • Pedro P. Costa
   • Fabrizio Salvi

   Original Investigations Pages: 341 - 343

7. Population cytogenetics of folate-sensitive fragile sites

   • Marketta Kähkönen

   Original Investigations Pages: 344 - 348

8. The pathology of trisomy 13 syndrome

   • Philippe Moerman
   • Jean-Piere Fryns
   • Joseph Lauweryns

   Original Investigations Pages: 349 - 356

9. Cytogenetic analysis of sperm from a male heterozygous for a 13;14 Robertsonian translocation

   • Renee H. Martin

   Original Investigations Pages: 357 - 361

10. Use of restriction fragment length polymorphic probes in the analysis of Down's syndrome trisomy

    • A. M. Millington-Ward
    • P. L. Pearson

    Original Investigations Pages: 362 - 370

11. A new LDL receptor gene deletion mutation in the South African population

    • Howard E. Henderson
    • G. Michael B. Berger
    • A. David Marais

    Original Investigations Pages: 371 - 374

12. Dissociation between mental retardation and fragile site expression in a family with fragile X-linked mental retardation

    • M. A. Voelckel
    • M. G. Mattei
    • J. F. Mattei

    Original Investigations Pages: 375 - 378

13. Segregation of linked probes to myotonic dystrophy in a family demonstrating that 152 and APOC2 are on the same side of DM on 19q

    • K. Johnson
    • E. Nimmo
    • R. Williamson

    Original Investigations Pages: 379 - 381

14. Synergistic effect of hydroxyurea and excessive thymidine on the expression of the common fragile sites at 3p14 and 16q23

    • Zu-an Yan
    • Xinzhi Li
    • Xianting Zhou

    Original Investigations Pages: 382 - 384

15. Glucose-6-phosphate dehydrogenase variants and their frequency in Guangdong, China

    • C. S. Du
    • Y. K. Xu
    • L. B. Liu

    Original Investigations Pages: 385 - 388

16. Assignment of human platelet GP2B (GPIIb) gene to chromosome 17, region q21.1-q21.3

    • Nguyen van Cong
    • G. Uzan
    • J. Frézal

    Original Investigations Pages: 389 - 392

17. Pelizaeus-Merzbacher disease: identification of heterozygotes with magnetic resonance imaging?

    • Eugen Boltshauser
    • Albert Schinzel
    • Anton Valavanis

    Short Communications Pages: 393 - 394

18. Lysinuric protein intolerance mutation is not expressed in the plasma membrane of erythrocytes

    • D. W. Smith
    • C. R. Scriver
    • O. Simell

    Short Communications Pages: 395 - 396

19. Assignment of human coagulation factor XII (fXII) to chromosome 5 by cDNA hybridization to DNA from somatic cell hybrids

    • F. Citarella
    • M. Tripodi
    • M. Rocchi

    Short Communications Pages: 397 - 398

20. Different numbers of maternal and paternal siblings of cystic fibrosis patients

    • Jürgen Gedschold
    • Reinhard Szibor
    • Margot Berger

    Short Communications Pages: 399 - 400

21. Interstitial deletion of chromosome 15: two cases

    • L. de F. Formiga
    • L. Poenaru
    • M. Pierson

    Clinical Case Report Pages: 401 - 404