1. Immunological similarities of mammalian xanthine oxidases

   • C. Y. Ho
   • L. G. Barr
   • A. J. Clifford

   OriginalPaper Pages: 209 - 221

2. Preferential gene expression of an amylase allele in interspecific hybrids of Xiphophorus (Pisces: Poeciliidae)

   • Rene J. Herrera

   Note Pages: 223 - 227

3. Activity and electrophoretic mobility of glutathione reductase allozymes in different tissues of the mouse

   • Stephen Firth
   • Josephine Peters
   • Grahame Bulfield

   Note Pages: 229 - 232

4. Inheritance of isozyme variation and heterozygosity in Pinus ponderosa

   • D. M. O'Malley
   • F. W. Allendorf
   • G. M. Blake

   OriginalPaper Pages: 233 - 250

5. Purine nucleoside phosphorylase variation in the brook lamprey, Lampetra planeri (Bloch) (Petromyzone, Agnatha): Evidence for a trimeric enzyme structure

   • R. D. Ward
   • B. J. McAndrew
   • G. P. Wallis

   OriginalPaper Pages: 251 - 256

6. Genetic polymorphism of the major parotid salivary glycoprotein (Gl) with linkage to the genes for Pr, Db, and Pa

   • Edwin A. Azen
   • Carolyn K. Hurley
   • Carter Denniston

   OriginalPaper Pages: 257 - 279

7. Red cell acid phosphatases of Propithecus verreauxi: Evidence for a high-activity allele

   • George A. Mason

   Note Pages: 281 - 285

8. Distinguishing allozymes and isozymes of phosphoglucoisomerases by electrophoretic comparisons of pollen and somatic tissues

   • N. F. Weeden
   • L. D. Gottlieb

   OriginalPaper Pages: 287 - 296

9. DNA of Akodon (Rodentia, Cricetidae). I. Biophysical characterization

   • L. Vidal-Rioja
   • L. Semorile
   • N. O. Bianchi

   OriginalPaper Pages: 297 - 303

10. Biochemical characterization of “LAP,” a polymorphic aminopeptidase from the blue mussel, Mytilus edulis

    • J. Peter W. Young
    • Richard K. Koehn
    • Norman Arnheim

    OriginalPaper Pages: 305 - 323

11. Expression of PGK-A in the Australian brush-tailed possum, Trichosurus vulpecula (Kerr), consistent with paternal X inactivation

    • J. L. VandeBerg
    • J. E. Thiel
    • D. W. Cooper

    OriginalPaper Pages: 325 - 332

12. Evolution of fraction 1 protein in the genus Lycopersicon

    • Hirofumi Uchimiya
    • Kevin Chen
    • S. G. Wildman

    OriginalPaper Pages: 333 - 341

13. Immunogenetic study on the polymorphism of serum α₂-lipoprotein in mink. III. Ld1 allotype of low-density lipoprotein

    • O. K. Baranov
    • M. A. Savina

    OriginalPaper Pages: 343 - 350

14. Partial purification and some properties of biopterin synthase and dihydropterin oxidase from Drosophila melanogaster

    • Ching Liang Fan
    • Gene M. Brown

    OriginalPaper Pages: 351 - 369

15. Purification and properties of the enzymes from Drosophila melanogaster that catalyze the synthesis of sepiapterin from Dihydroneopterin triphosphate

    • Gwen G. Krivi
    • Gene M. Brown

    OriginalPaper Pages: 371 - 390

16. Segregation of the isozymes of flax genotrophs

    • C. A. Cullis

    OriginalPaper Pages: 391 - 401

17. Announcements

    Announcement Pages: 403 - 403