1. Improved medium for clonal growth of human diploid fibroblasts at low concentrations of serum protein

   • Wallace L. McKeehan
   • Kerstin A. McKeehan
   • Richard G. Ham

   OriginalPaper Pages: 399 - 416

2. Effects of bacterial agarase on agarose gel in cell culture

   • J. Carlsson
   • M. Malmqvist

   OriginalPaper Pages: 417 - 422

3. Organ culture of human articular cartilage: Studies on sulphated glycosaminoglycan synthesis

   • L. S. McKenzie
   • B. A. Horsburgh
   • T. K. F. Taylor

   OriginalPaper Pages: 423 - 428

4. Uracil phosphoribosyl transferase activity of mycoplasma and infected cell cultures

   • C. W. Long
   • R. DelGiudice
   • M. Hatanaka

   OriginalPaper Pages: 429 - 433

5. Effects of cytosine arabinoside on in vivo and in vitro mouse limb development

   • Jeanne M. Manson
   • Michael L. Dourson
   • Carl C. Smith

   OriginalPaper Pages: 434 - 442

6. Effect of cyclic 3′:5′-AMP derivatives, prostaglandins and related agents on human chorionic gonadotropin secretion in human malignant trophoblast in culture

   • Robert O. Hussa
   • Michaei T. Story
   • Robert G. Kemp

   OriginalPaper Pages: 443 - 449

7. Induction of placental alkaline phosphatase in choriocarcinoma cells by 5-bromo-2′-deoxyuridine

   • Janice Y. Chou
   • J. C. Robinson

   OriginalPaper Pages: 450 - 460