1. A pro-B-cell stage characterized by germline Ig transcription without surrogate light chain expression

   • A. Thompson
   • Gaby S. Brouns
   • Erik Timmers

   ORIGINAL PAPER Pages: 305 - 311

2. Patterns of reticulate evolution for the classical class I and II HLA loci

   • I. B. Jakobsen
   • Susan R. Wilson
   • S. Easteal

   ORIGINAL PAPER Pages: 312 - 323

3. A geometric study of the amino acid sequence of class I HLA molecules

   • P. Cano
   • B. Fan
   • Sanford Stass

   ORIGINAL PAPER Pages: 324 - 334

4. A genetic linkage map of rat chromosome 20 derived from five F₂ crosses

   • Y. Kawahito
   • Elaine F. Remmers
   • Marie M. Griffiths

   BRIEF COMMUNICATION Pages: 335 - 338

5. β₂-microglobulin of Ictalurid catfishes

   • Michael F. Criscitiello
   • Ralph Benedetto
   • T. J. McConnell

   BRIEF COMMUNICATION Pages: 339 - 343

6. Limited polymorphism in the first domain of the rat MHC class II RT1-D molecule

   • M. Vestberg
   • Ulrica Brunsberg
   • Rikard Holmdahl

   BRIEF COMMUNICATION Pages: 344 - 349

7. HLA-A26 subtype A pockets accommodate acidic N-termini of ligands

   • Tilman Dumrese
   • Stefan Stevanović
   • H.-G. Rammensee

   PEPTIDE MOTIF REGISTER Pages: 350 - 353

8. Cloning and sequencing of cDNA encoding mouse cytohesin-1

   • A. M. O'Rourke
   • Guia Escuro
   • Ann J. Feeney

   SEQUENCE REGISTER Pages: 354 - 355

9. Sequence analysis of DA and Sprague Dawley rat T-cell receptor β-chain promoters

   • James E. Sillibourne
   • R. A. Kay

   SEQUENCE REGISTER Pages: 356 - 358

10. Cloning and characterization of sheep (Ovis aries) immunoglobulin α chain

    • G. P. White
    • Peter Roche
    • Els N. T. Meeusen

    SEQUENCE REGISTER Pages: 359 - 362