144 



SUBJECT INDEX 



Sperm cells, amino acid incorporation 



in, and RNA content of, 6 

 Spinocaudal (mesodermic) induction, 



59,72 

 Spleen, RNA content, 7 

 Spontaneous neuralization, 59, 77, 78, 



84 

 Staphylococcus, 



protein metabolism of disrupted, 

 30, 31 



protein and nucleic acid synthesis 

 in, 8, 18 



RNase digests of RNA in, 31 

 Starfish oocytes, 



effects of RNase on, 40 



incorporation of amino acids into 

 nucleolus of, 98 

 Sublethal cytolysis, 77, 86 

 Sulfhydril groups (see — SH groups) 

 Sulfur, role of, in morphogenesis, 118 

 Surface coat (see Matrix) 



Taricha, 83 



Template hypothesis, 47-49, 1 30 



Terramycin, 8 



Testis, RNA in, 6, 7 



Thermobacteriiim acidophilus, DNA, 



RNA and protein synthesis in, 17 

 Thiouracil, 



as inhibitor of glycine uptake, 119 



on plant viruses, 27 

 Thymus, RNA content, 7 

 Tissue cultures, antimitotic activity of 



RNase in, 41 

 Tobacco mosaic virus, 



amino acid incorporation into pro- 

 teins of, 23, 25 



effects of RNase on, 42, 43 



mutant strains of, 29, 30 



as neural inductor, 58 



"resynthesis", from its RNA and 

 protein constituents, 28 



role of RNA and proteins in multi- 

 plication of, 25-30 



structure, 26, 27 

 Transfer experiments on nuclei, 101 

 Tricarboxylic acid (Krebs) cycle, 



effects of lithium on, 70 



Triton, 126 



Triturus rivularis and T. torosus, 59 



Trypaflavine, 119 



Trypsin in microsomes, 20 



Tryptophane, 46 



Tumors, 



RNA content, 7 



RNase inhibition of growth of, 41 

 Turnip yellow mosaic virus, role of 



RNA and proteins in multiplication 

 of, 25, 26 



Ultraviolet (U.V.), 



absorption, and RNA content, 7 

 irradiation effects, on DNA, RNA 



and protein synthesis, 18 

 microspectrophotometry, 3 



Unna staining, 3, 101 



Uracil, incorporation, into RNA after 

 enucleation, 104, 105 



Uridine, 99 



Uridine triphosphate, 24 



Usnic acid, 

 effects of, on nuclei, 124 

 inhibition of development by, 68 



Vaccinia, 43 



Versene-RNase mixture, effects on 

 morphogenesis, 79, 80, 84, 85 



Vicia faba, 5 



Viruses, 

 effects of RNase on multiplication 



of, 42, 43 

 infectivity of abnormal or "resyn- 



thesized", 28, 29 

 microsome- virus hypothesis, 81 

 role of RNA in plant — , 25-30 

 tobacco mosaic (see Tobacco) 

 turnip yellow mosaic (see Turnip) 



Yeasts, 



effects of —RNA, on RNase- 



blocked amoebae or roots, 37, 38 

 induced enzyme synthesis in, 18, 19 

 RNA content, 4 



Zenker fixative, effects on RNA- 

 RNase complex, 38 



