The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number (Z).

TLS Online TPP Program

#Id: 8323

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 8356

#Section 3: Genetics, Cellular and Molecular Biology

ActA protein binds the host protein VASP, which enhance actin assembly and confine it to the rear of the bacterium.

TLS Online TPP Program

#Id: 9269

#Section 2: General Biology

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: 8411

#Section 3: Genetics, Cellular and Molecular Biology

In the absence of Ca2+, muscle is relaxed

TM blocks myosin’s interaction with F-actin

TLS Online TPP Program

#Id: 10300

#Section 2: General Biology

T-Cell Activation and Differentiation