... In this time I realized that my main interest lay in physiology and in biological chemistry. ... and metabolites as well as with the contents of the Biochemistry text book of Fruton and Simmons. I found all this very exciting, but it was far beyond the curriculum for a biology teacher. ...
![(2S)-2-amino-N-[(2S)-1-amino-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]-4-methylpentanamide结构式](https://image.chemsrc.com/caspic/273/17263-43-3.png)