R. R. PORTER and F. SANGER 



have been found. It may well be that other different terminal peptides 

 occur and that the polypeptide chains vary significantly in the sequence 

 of amino-acids, making the final solution of the detailed structure of 

 this protein an even more formidable problem. 



REFERENCES 



1 Porter, R. R. and Sanger, F. Bio-chem. J. 42 (1948) 287 



2 Sanger, F. Bio-chem. J. 39 (1945) 507 



3 Gordon, A. H., Martin, A. J. P. and Synge, R. L. M. Bio-chem. J. 37 (1943) 79 



• Hetkoen, L. and Schulkof, K. /. infect. Dis. 33 (1923) 224 



• — and Boor, A. K. /. infect. Dis. 49 (1931) 29 



« Heidelberger, M. and Landsteiner, K. J. exp. Med. 38 (1923) 561 



7 Hetkoen, L. /. infect. Dis. 42 (1928) 31 



8 Darrow, R. R., Nowakovsky, S. and Austin, M. H. Arch. Path. Lab. Med. 



30 (1940) 873 



• Porter, R. R. Ph.D. Thesis. Cambridge University (1948) 

 io _ Biochimica et Biophysica Acta 2(1948)105 



124 



