Exogen transport

Flow Caused by Applied Electric Field (Exogen Transport)... 

The US Environmental Protection Agency (EPA) Risk Assessment Foriim An endocrine disrupter is an exogenous agent that interferes with the synthesis, secretion, transport, binding, action, or elimination of natural... 

Recently, a potential cytosolic component of the MEP precursor pathway, xylulose kinase, has been cloned and tested for function in an Escherichia coli complementation system. " The kinase activates exogenous xylulose in the cytoplasm. DXP is the precursor for DXS, which resides in the plastid, suggesting the activated substrate must be transported into the plastid. Another xylulose kinase homologue in Arabidopsis that contains a plastid targeting sequence was not active in the E. coli system, suggesting that it may have some other function in the plastid. Perhaps plant and bacterial tissue cultures may be fed xylulose to condition accumulation of isoprenoid metabolites. 

Lymphocytes are of two sizes smaller lymphocytes, with a diameter of 6-8 pm, and larger lymphocytes, with a diameter up to 18 pm. They are found not only in blood, but in lymph and in every tissue of the body. Larger lymphocytes are believed to be cells that differentiate into T and B lymphocytes when activated by specific antigens. The life span of lymphocytes may vary from a few days to many years. Lymphocytes have been suggested as potential carriers for transporting macromolecules, particularly DNA, to other cells. Low molecular weight exogenous substances can be introduced into lymphocytes by electrical breakdown methods. 

Amessou, M., Fradagrada, A., Falguieres, T., Lord, J.M., Smith, D.C., Roberts, L.M., Lamaze, C., and Johannes, L. (2007) Syntaxin 16 and syntaxin 5 are required for efficient retrograde transport of several exogenous and endogenous cargo proteins./. Cell Sci. 120, 1457-1468. 

Retrograde transport returns trophic factors, exogenous material and old membrane constituents to the cell body 492... 

Some studies indicated that exogenous zearalenone influences plant growth and development. For example, zearalenone stimulated the initiation of the vegetative bud in tobacco pith callus tissue (Mirocha et al. 1968), inhibited the cell membrane transport of maize roots (Vianello and Macri 1981) and enhanced the a-amylase and P-glucosidase activities of germinating maize seeds. 

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