| Autor: |
Mackey, Jesse K., Beck, Raymond W. |
| Zdroj: |
Applied Microbiology; October 1968, Vol. 16 Issue: 10 p1543-1547, 5p |
| Abstrakt: |
Strains of Streptococcus faecalisand S. faeciumare known to produce ammonia from arginine, but only S. faecaliscouples the adenosine triphosphate (ATP) produced through the arginine dihydrolase pathway to growth processes. The specific activities of the arginine dihydrolase enzymes were found to be much lower in S. faecium(0.01 to 0.10) than in S. faecalis(0.24 to 1.60). Phosphatase activities in both strains were similar (up to 0.11), but equaled or exceeded the activities of the arginine dihydrolase enzymes in S. faecium. The failure of S. faeciumto show increased growth in arginine media is explained on the basis of low activities of the arginine dihydrolase enzymes coupled with sufficient phosphatase activity to negate any benefit from ATP formed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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