CONTENTS 
Uptake of tyrosine by brain in vivo and in vitvo (Invited Discussion) 
by G. GUROFF AND.S. UDENFRIEND (Bethesda, Md.) 
Cerebral passage of free amino acids (Invited Discussion) * 
by A. Laytua (New York) 
Discussion 
Chairman: H. CHRISTENSEN . 
Transport and accumulation of amino acids by microorganisms 
by J. T. HoLpEN (Duarte, Calif.) . : 
The mechanism of amino acid pool formation in up coli 
by R. BRITTEN AND F. T. McCLure (Washington D.C.) 
Some properties and potential uses of bacterial mutants defective inamino acid transport 
(Invited Discussion) * 
by M. Lusrn (Boston, Mass.) . 
Discussion 
Chairman: H. CHRISTENSEN . 
II. Amino acid pool turnover 
Limiting factors in biosynthesis of macromolecules 
by J. M. RErNerR (Atlanta, Ga.) : : 
Metabolic pools and the biosynthesis of protein 
by D. B. Cowte (Washington D.C.) . 
The function and control of intracellular protein turnov er in microorganisms 
by H. O. Hatvorson (Madison, Wisc.) 
Discussion 
Chairman: J. REINER . : 
Dynamics of amino acids in plants 
by S. ARONOFF (Ames, Lowa) 
The free nitrogen compounds in plants considered in ‘relation to metabolism 
by F. C. STEWARD AND R. G. S. BIDWELL (Ithaca, N.Y.). 
Amino acid pools, protein synthesis and protein turnover in human cell cultures 
by H. EaGLe anv K. A. Prez (New York) . 
Discussion 
Chairman: J. REINER . 
The role of the liver and the non- hepatic tissues in the regulation of the blood free amino acids 
levels 
by L. L. MILLER (Rochester, N.Y.) : 
In vivo seers of glutamic acid metabolism i in brain and live er 
by H. WaeEtscu (New York City, N.Y.)* 
Discussion 
Chairman: H. EAGLE 
Free amino acids as obligatory intermediates . in ‘protein sy ynthesis 
by R. B. Lorrri1e_p (Boston, Mass.) 
Discussion 
Chairman: H. EaGLe . 
Biochemical production of lipo—amino acid ‘compounds 
by B. AXELRop, J. L. HarnrnG anp T. Fuxut (Lafayette, Ind.) 
On the metabolic importance of amino acid—lipid complexes 
by R. W. HENDLER (Bethesda, Md.) 
Discussion 
Chairman: H. EAGLE 
III. Round Table Discussion 
State of the intracellular amino acids 
Edited by E. HEINz 
Author Index 
Subject Index 
* Invited contribution not presented at the conference. 
XI 
