The Journal of General Physiology, Vol 17, 797-801,
Copyright © 1934 by The Rockefeller University Press
THE ULTRAVIOLET ABSORPTION SPECTRUM OF PEPSIN
Frederick L. Gates 1
1 From the Laboratory of General Physiology, Harvard University, Cambridge
The ultraviolet absorption spectrum of Northrop's pure crystalline pepsin has been determined. The curve of calculated molecular extinction coefficients is given. There is noted a general resemblance of the absorption curve for pepsin to that for urease and tyrosine; the absorption band is maximum at 27502800 Å.µ., minimum near 2500. A slight hump on either side of the peak of the extinction curve may be significant.
Accepted on February 19, 1934