Dynamic instability 

Rapid interconversion between a growing and shrinking state, at a uniform free tubulin concentration

TLS Online TPP Program

#Id: 9556

#XL - T Zoology

TLS Online TPP Program

#Id: 9269

#XL - R Botany

Fe protein 

contains 2 identical subunits (dimer) – nif H

Each subunit has MW of 30 ~ 72 kD.

Each subunit contains an Fe-S cluster (4Fe and 4S2-).

TLS Online TPP Program

#Id: 8043

#XL - Q Biochemistry

RS Configuration 

Atoms of higher atomic number rank above those of lower atomic number (e.g., —OH ranks above —CH3). If the first substituent atoms are identical, the priority is established by the next atom outward from the chiral center (e.g., —CH2OH takes precedence over —CH3).

TLS Online TPP Program

#Id: 10108

#XL - T Zoology

Tight junctions seal off body cavities and restrict diffusion of membrane components

TLS Online TPP Program

#Id: 7058

#XL - T Zoology

The Forces of Evolution

mutation, 

genetic drift

gene flow or migration

selection.