Homoserine, Homocysteine, Methionine, and Derivatives

Sulphuration of 0-acetylhomoserine to homocysteine is catalysed by enzymes in spinach. The product is further transformed into S-adeno yl-homocysteine and methionine. The main pathway of sulphur to methionine. 

Canavanine (23) is a well-known constituent of Leguminosae. Its degradation product, canaline (24), has also been identified in several leguminous species. Fission of canavanine in Caragana spinosa to canaline and urea has been studied both in vivo and in vitro. Part of the canaline is further degraded 

Albersheim, Arch. Biochem. Biophys., 1967,121, 732. 

Tocpfer, J. Miersch, and H. Retnbothe, Biochem. Physiol Pjlanz., 1970,161, 231. 

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