2 
TABLE OF CONTENTS 
I. SUMMARY AND CONCLUSIONS p.3 
II. INTRODUCTION p.7 
III. COMPARISON OF NIH GUIDELINES SPECIFICATIONS FOR EK-2 
HOST TO THE PROPERTIES OF X* 776 AND X 1876 p.9 
IV. CRITIQUE OF "CONSTRUSTION PROPERTIES AND TESTING OF 
Xl 77 6" p. 13 
A. EXPERIMENTS REPORTED §§1-21 : p.13 
Strain construction: §§1-4 p.13 
Genotypic characterization: §§5-7 p.14 
Phenotypic characterization: §§8-14....: p.15 
Potehtial for transmissability of genetic infor- 
mation by strains: §§15-21 p.20 
B. SOME EXPERIMENTS WHICH HAVE YET TO BE PERFORMED p.23 
V. REFERENCES p.26 
[Appendix C — 190] 
