We investigated the amount of urease as compared with the amount of protein found in the seeds of various Canavalia and the results are summarized in the following table: (snip) Then we studied the size of particles of Jack bean urease by means of ELFORD's ultrafiltration through collodion membrane having several kinds of porosity, as follows: (snip) Jack bean urease was known to be not homogeneous in size, i. e. it is contained in different states of aggregation in seeds. We compared the permeability of the Amer i can Jack bean urease with that of the Japanese one by the same method; (snip) From these results, it was concluded that there is found in the American Jack bean which easily gives the crystalline urease, a larger amount of urease which can pass in minute particules through a membrane of 187 mμ porosity, than is contained in the Japanese bean.
Mendeley出力
