SUBJECT INDEX 



141 



Membrane, 



cellophane (see Cellophane) 

 cellular (see Cell, membrane) 

 millipore, 84 

 Mercaptoethanol, inhibition of cap 



formation by, 118 

 Merotomy experiments, 96, 100-125 

 Mesodermic (spinocaudal) induction 



59, 72 

 Methionine, 

 incorporation, 



into microsomes, 21 

 into nuclear proteins, 99, 100 

 into proteins after enucleation, 

 107 

 stimulation by, of cap formation, 

 118 

 Methyl green, 2 

 Microcephaly, 69, 70 

 Micrococcus lysodeikticus, 32 

 Microsomes, 

 RNA in ergastoplasm or in, after 



enucleation, 102, 115 

 role of, 



in induction, 58, 80-87 

 in protein synthesis, 19-25 

 -virus hypothesis, 81 

 Millipore membrane, 84 

 Mitochondria, 

 control of nucleus by, 124 

 gradients of, during development, 



65, 66, 87 

 incorporation of amino acids in, 21 

 role of, in protein synthesis, 44 

 Molds, impermeability to RNase, 41 

 Mouse, 

 incorporation of amino acids into 



nuclei in, 98, 99 

 inhibition of tumor growth by 

 RNase in, 41 

 Mucopolysaccharides, 85 

 Muscle, 



amino acid incorporation into, 6, 25 

 RNA content, 4 

 Mutant strains, of Tobacco mosaic 



virus, 29, 30 

 Mytilus, incorporation of RNA pre- 

 cursors in polar lobes in, 127 



Nerve cells, 



amino acid incorporation in, 6 

 RNA content, 4 

 Neuralization (see Spontaneous) 

 Neurospora, 99 

 Neutral red, diffusion, from cell to cell, 



82, 83 

 Nuclei, 



isolated, 127, 128 

 role of, 



hypotheses on biochemical, 94, 



95 

 materials and methods for study 



of, 95-98 

 in morphogenesis, 87-90 

 in RNA and protein synthesis, 

 95-132 



in Acetabularia, 108-125 

 in amoebae, 100-108 

 in intact cells, 98-100 

 in reticulocytes and eggs, 125- 

 127 

 Nucleic acid synthesis, 8 

 Nucleoli, RNA anabolism, 98, 99 

 Nucleotides, 40 



in enucleated Acetabularia, 119 

 nucleus as main site of synthesis of, 

 130 



Onion roots, 

 effects of RNase on, 34, 37, 38, 



41 

 RNA content, 4 

 Organizer, 

 effects on, 



by centrifugation or heat shocks, 



71 

 by lithium, 69, 70 

 by RNase, 80 

 induction by explanted, 59 

 ribonucleoprotein diffusion from, 



82, 83 

 role of microsomes in, 80-87 

 Orotic acid, 114 

 Oxidative phosphorylation, 

 inhibition of, 44, 68 

 role of, in amino acid incorporation, 

 21,44 



