CONTENTS IX 



27. The Biological Role of the Deoxypentose Nucleic Acids by Rollin D. 



HOTCHKISS 435 



I. Deoxypentose Nucleic Acids as Genetic Determinants 435 



II. Deoxypentose Nucleic Acids in Growth and Metabolism 456 



III. Other Aspects of DNA Function 469 



IV. Summary — Infection, Heredity, and Infectious Heredity 473 



28. The Biological Role of the Pentose Nucleic Acids by J. Bracket 476 



I. The Role of PNA in Plant Viruses 476 



II. The Role of PNA in Morphogenesis 478 



III. PNA and Protein Synthesis 486 



IV. Addendum 513 



Author Index 521 



Subject Index 546 



