The phyB mutants are deficient in chlorophyll

phyB also appears to regulate LFRs, such as photoreversible seed germination

Mutants that lack phyA respond normally to red light, whereas mutants deficient in phyB are unable to respond to low-fluence red light

TLS Online TPP Program

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#XL - R Botany

Rb protein regulation by G1 CDKs in mammalian cells is analogous to Whi5 regulation by Cln3-CDK in yeast.

TLS Online TPP Program

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#XL - R Botany

One of the important substrates of the G1/S phase cyclin-CDK complexes is Cdh1.

TLS Online TPP Program

#Id: 8647

#XL - R Botany

TLS Online TPP Program

#Id: 8648

#XL - R Botany

During exit from mitosis and G1, 

Cdh1 is de-phosphorylated and APC/Ccdh1 is active.

TLS Online TPP Program

#Id: 8649

#XL - R Botany

During S phase and mitosis, 

Cdh1 is phosphorylated, Cdh1 dissociates from APC/C, and APC/C becomes inactive.

TLS Online TPP Program

#Id: 8650

#XL - R Botany

G1/S phase CDKs phosphorylate Cdh1 at the 

G1-S phase transition