In uranium leaching, Acidophillus ferrooxidans oxidizes U4+ to U6+ with O2 as an electron acceptor. 

However, Uranium leaching depends more on the abiotic oxidation of U4+  by Fe3+ with A. ferrooxidans contributing to the process mainly through the reoxidation of Fe2+ to Fe+3, as in copper leaching.

TLS Online TPP Program

#Id: 9714

#Unit 4. Cell Communication and Cell Signaling

Ste11 analogous to Raf and other mammalian MEK kinase (MEKK) proteins.

TLS Online TPP Program

#Id: 9715

#Unit 4. Cell Communication and Cell Signaling

Activated Ste11 then phosphorylates Ste7, a dual-specificity MEK.

TLS Online TPP Program

#Id: 9716

#Unit 4. Cell Communication and Cell Signaling

Ste7, phosphorylates and activates Fus3,  a serine/threonine kinase

TLS Online TPP Program

#Id: 9717

#Unit 4. Cell Communication and Cell Signaling

Fus3 equivalent to MAP kinase

TLS Online TPP Program

#Id: 9718

#Unit 4. Cell Communication and Cell Signaling

Fus3 translocates into the nucleus & phosphorylates two proteins, Dig1 and Dig2.

TLS Online TPP Program

#Id: 9719

#Unit 4. Cell Communication and Cell Signaling

Phosphorylated Dig1 and Dig2, relieves the inhibition of the Ste12 transcription factor.