1. Kinship mapping of multilocus systems

   • N. E. Morton
   • S. P. Simpson

   Original Investigations Pages: 103 - 104

2. Genetic control of adrenergic receptors on human platelets. A twin study

   • P. Propping
   • Waltraut Friedl

   Original Investigations Pages: 105 - 109

3. Cloning of genomic sequences from the human Y chromosome after purification by dual beam flow sorting

   • C. R. Müller
   • K. E. Davies
   • H. H. Ropers

   Original Investigations Pages: 110 - 115

4. Clinical heterogeneity in the tricho-dento-osseous syndrome

   • F. Quattromani
   • S. D. Shapiro
   • R. R. Reece

   Original Investigations Pages: 116 - 121

5. Origin of chromosomal abnormalities: Evidence for delayed fertilization in meiotic nondisjunction

   • R. C. Juberg

   Original Investigations Pages: 122 - 127

6. Retinoblastoma mutation rate in New Zealand and support for the two-hit model

   • P. H. Fitzgerald
   • Joanna Stewart
   • R. D. Suckling

   Original Investigations Pages: 128 - 130

7. Induction of structural chromosome aberrations and sister chromatid exchanges in human lymphocytes in vitro by aristolochic acid

   • Gudrun Abel
   • O. Schimmer

   Original Investigations Pages: 131 - 133

8. Suggested assignment of peptidase S (PEPS) to 4q11-4q12 by exclusion using gene dosage, accounting for variability in fibroblasts

   • Sheila M. Schmutz
   • Nancy E. Simpson

   Original Investigations Pages: 134 - 138

9. Menkes kinky hair disease: A search for closely linked restriction fragment length polymorphism

   • P. Wieacker
   • Nina Horn
   • H. H. Ropers

   Original Investigations Pages: 139 - 142

10. Linkage relationships between retinoschisis, Xg, and a cloned DNA sequence from the distal short arm of the X chromosome

    • P. Wieacker
    • T. F. Wienker
    • H. H. Ropers

    Original Investigations Pages: 143 - 145

11. Glyoxalase I “null” allele in a new family: Identification by abnormal segregation pattern and quantitative assay

    • R. S. Sparkes
    • Maryellen C. Sparkes
    • Carol E. Anderson

    Original Investigations Pages: 146 - 147

12. Expression of the fragile (X) chromosome in an interspecific somatic cell hybrid

    • R. L. Nussbaum
    • Susan D. Airhart
    • D. H. Ledbetter

    Original Investigations Pages: 148 - 150

13. Low incidence of deletion of the esterase D locus in retinoblastoma patients

    • T. P. Dryja
    • G. A. P. Bruns
    • P. S. Gerald

    Original Investigations Pages: 151 - 155

14. A maximum likelihood estimate of the sex ratio of mutation rates in Haemophilia A

    • R. M. Winter
    • E. G. D. Tuddenham
    • K. B. Matthews

    Original Investigations Pages: 156 - 159

15. A recognizable pattern of the midface of retinoblastoma patients with interstitial deletion of 13q

    • T. Motegi
    • M. Kaga
    • K. Minoda

    Original Investigations Pages: 160 - 162

16. Terminal or interstitial deletion in chromosome 8 long arm in Langer-Giedion syndrome (TRP II syndrome)?

    • Erica M. Bühler
    • U. K. Bühler
    • R. Christen

    Original Investigations Pages: 163 - 166

17. Response of lymphocytes from Fanconi's anemia patients and their heterozygous relatives to 8-methoxy-psoralene in a cloning survival test system

    • E. Wunder
    • Fleischer-Reischmann

    Original Investigations Pages: 167 - 172

18. Characterization of weak alleles at the DIA₁ locus (Mustapha 1, Mustapha 2, and Mustapha 3) in the Algerian population

    • A. Reghis
    • C. Troungos
    • J. C. Kaplan

    Original Investigations Pages: 173 - 175

19. Population screening for glucose-6-phosphate dehydrogenase deficiency on the baleares

    • A. Miguel
    • M. Ramon
    • A. J. M. Vermorken

    Original Investigations Pages: 176 - 179

20. Assignment of the human coproporphyrinogen oxidase to chromosome 9

    • B. Grandchamp
    • Dominique Weil
    • Marie-Sylvie Gross

    Short Communications Pages: 180 - 183

21. A new single band variant of the Gc subtypes determined by isoelectric focusing

    • I. Nakasono
    • M. Iwasaki
    • Y. Tomohiro

    Short Communications Pages: 184 - 185

22. The C4 β-chain: Evidence for a genetically determined polymorphism

    • G. Mauff
    • Miriam Steuer
    • K. Bender

    Short Communications Pages: 186 - 188

23. Properdin factor B (Bf) polymorphism: Subtyping of SS phenotypes

    • V. David
    • R. Fauchet
    • J. Y. Le Gall

    Short Communications Pages: 189 - 190

24. Prenatal diagnosis of osteogenesis imperfecta type II by real-time ultrasound

    • J. D. Stephens
    • R. A. Filly
    • M. S. Golbus

    Clinical Case Reports Pages: 191 - 193

25. Langer-Giedion syndrome and deletion of the long arm of chromosome 8. Confirmation of the critical segment to 8q23

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

    Clinical Case Reports Pages: 194 - 195

26. Interstitial deletion in the “critical region” of the long arm of the X chromosome in a mentally retarded boy and his normal mother

    • Ann Tabor
    • O. Andersen
    • H. Sardemann

    Clinical Case Reports Pages: 196 - 199

27. A case of 21q-syndrome with half normal SOD-1 activity

    • K. Yoshimitsu
    • S. Hatano
    • T. Usui

    Clinical Case Reports Pages: 200 - 202

28. Terminal rearrangement of chromosomes 21 detected in amniotic fluid, resulting in a trisomy 21

    • Gerda Cohen
    • Anne Manuel
    • W. McBride

    Cases Observed Pages: 203 - 203

29. Xeroderma pigmentosum (XP)

    • Xeroderma Pigmentosum Registry
    • W. Clark Lambert

    Cases Observed Pages: 204 - 204

30. Is the interstitial delection of 13q in retinoblastoma patients not transmissible?

    • T. Motegi
    • M. Komatsu
    • K. Minoda

    Letter to the Editors Pages: 205 - 205