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Rule of thumb for time it takes a metabolite (lactate) to diffuse across the cell

Value	1e-3 sec
Organism	Bacteria Escherichia coli
Reference	Calculated according to E. coli cell diameter and D of lactate in rat erythrocyte. Please see Measurement Method
Method	Taking X, distance to be traveled, as 1µm (BNID 100 002) and D of lactate in cytoplasm, 210 µm^2/sec (BNID 104644). According to equation of diffusion (in 3 dimensions): t diffusion=X^2/(6×D). (1µm)^2/1260µm^2/sec=0.0008sec˜0.001sec.
Entered by	Uri M
ID	104674