
Full text loading...
SUMMARY: Five mutants of Escherichia coli which grow to a greater or less extent when the minimal medium is supplemented with vitamin B6 have been studied. They fall into two groups according to the further effect of serine + glycine on growth. (1) Two strains showed full and rapid growth with pyridoxine alone and serine + glycine neither replaced this vitamin nor enhanced growth in its presence. (2) Three strains showed delayed and suboptimal growth with pyridoxine alone. With these serine + glycine had two effects: (a) it decreased the lag and enhanced the final extent of growth when added with pyridoxine; (b) it permitted suboptimal growth in the absence of pyridoxine. The second effect was dependent on (two strains), or greatly increased by (one strain), the concurrent addition of glyeolaldehyde.
Article metrics loading...
Full text loading...
References
Data & Media loading...