Sphingosine itself can be phosphorylated to produce sphingosine-1-phosphate (S1P) inside cells. 

TLS Online TPP Program

#Id: 8872

#Section 3: Genetics, Cellular and Molecular Biology

The entire process of mitotic CDKs activation and entry into mitosis involves two positive feedback loops and coordination between events at the centrosome, in the cytoplasm, and in the nucleus.

TLS Online TPP Program

#Id: 8537

#Section 3: Genetics, Cellular and Molecular Biology

Augmin-induced branches help build the spindle during mitosis.

TLS Online TPP Program

#Id: 10370

#Section 2: General Biology

HLA-G

These are present on fetal cells at the maternal-fetal interface and are credited with inhibiting rejection by maternal CD8+ T cells by protecting the fetus from identification as foreign.

TLS Online TPP Program

#Id: 8991

#Section 3: Genetics, Cellular and Molecular Biology

Incomplete lineage sorting (hemiplasy)

If you make a phylogenetic tree of how the alleles are related to each other, it does not mirror how the species split apart.

TLS Online TPP Program

#Id: 8171

#Section 3: Genetics, Cellular and Molecular Biology

In mammalian cells, Rab5 protein (early endosomes) and its effector protein known as EEA1 (early endosome antigen 1)