Amino acid transport inAzotobacter vinelandii: implications of nonavailability of amino acid auxotrophs
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چکیده
منابع مشابه
Placental amino acid transport.
Normal fetal growth and development depend on a continuous supply of amino acids from the mother to the fetus. The placenta is responsible for the transfer of amino acids between the two circulations. The human placenta is hemomonochorial, meaning that the maternal and fetal circulations are separated by a single layer of polarized epithelium called the syncytiotrophoblast, which is in direct c...
متن کاملAmino Acid Transport
I[I. Place of co-transport with Na ÷ . . . . . . . . . . . . . . . . . . . . . . . . . 489 A. Must the energy for Na+-dependent, uphill amino acid transport be channeled through alkali-metal gradients? . . . . . . . . . . . . . . . . . . . . . . . . . . . 489 B. Attempts to eliminate experimentally the alkali-metal ion gradients without dissipating other forms of transport-related energy storag...
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The transport of three neutral amino acid analogs has been studied in an epithelial cell line from a pig kidney. 2-Aminoisobutyric acid is accumulated by U C PKI cells against a concentration gradient through a mechanism with several features of a carrier-mediated process. The influx is accounted for by a saturable Na+dependent and nonsaturable Na+-independent process. The total influx of 2-(me...
متن کاملDisorders of amino acid transport
S. SEGAL of inherited metabolic diseases such as cystinosis, hereditary Division of Biochemical Development and Molecular Diseases, fructose intolerance and tyrosillaemia, and in most CaSeS is a Children’s Hospital of Philadelphia, and Departments of secondary phenomenon. Taken as a group, amino acid transport Pediatrics and Medicine, university of Pennsyfvania School of abnormalities are among...
متن کاملSelective enrichment of aromatic amino acid auxotrophs in Hansenula polymorpha.
Aromatic amino acid auxotrophs of the methanol-utilizing yeast Hansenula polymorpha were effectively selected by the use of nystatin and a medium that inhibits the growth of tyrosine auxotrophs. The procedure resulted in a frequency of aromatic auxotrophs of 2% of survivors and an enrichment of 20-fold. The new procedure also takes less time than traditional procedures. Of the auxotrophic mutan...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1991
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1991.tb04501.x