Monomeric active forms of all members of the TGF-β family (3 conserved intramolecular disulfide Linkages) contain a conserved cysteine residue that forms a disulfide bond links TGF-β monomers into functional homodimers

and heterodimers

TLS Online TPP Program

#Id: 8033

#XL - Q Biochemistry

Glycine & Proline are relatively polar considering negative hydropathy index (-0.4 & -1.6) comparing to other nonpolar amino acids.

TLS Online TPP Program

#Id: 9971

#XL - T Zoology

β-catenin Destruction Complex contains:

Tumor suppressor APC

Dvl protein

Constitutively active protein kinases GSK 3β and CK1

TLS Online TPP Program

#Id: 8362

#XL - Q Biochemistry

Myosin 

Actin-based motors powered by ATP hydrolysis.

TLS Online TPP Program

#Id: 4691

#XL - T Zoology

Some cells carry a cheater mutation that makes spores but that avoids contributing to the stalk.

TLS Online TPP Program

#Id: 2167

#XL - T Zoology

Natural selection is any consistent difference in fitness among different classes of biological entities.