Electron affinity: The enthalpy change that results from adding an electron to a gaseous atom.

Electron affinity is becoming less negative (less exothermic) and less likely to gain an electron. 

TLS Online TPP Program

#Id: 8526

#Section 3: Genetics, Cellular and Molecular Biology

Polyglutamylation and polyglycylation are likely mutually exclusive, so they would not normally occur at the same time & both can enhance microtubule stability,

TLS Online TPP Program

#Id: 8525

#Section 3: Genetics, Cellular and Molecular Biology

Detyrosylated microtubules are more stable, because they are more resistant to depolymerization by kinesin-13 and related proteins.

TLS Online TPP Program

#Id: 8524

#Section 3: Genetics, Cellular and Molecular Biology

Detyrosylation 

tyrosine can be removed by a carboxypeptidase, where it sequentially removes the C-terminal tyrosines from α-tubulin subunits. 

TLS Online TPP Program

#Id: 8523

#Section 3: Genetics, Cellular and Molecular Biology

TLS Online TPP Program

#Id: 8522

#Section 3: Genetics, Cellular and Molecular Biology

Lysine acetylation 

ε-amino group of a specific lysine of α-tubulin

Microtubules are stabilized against breakage (centrioles, basal bodies, & primary cilia)

TLS Online TPP Program

#Id: 8521

#Section 3: Genetics, Cellular and Molecular Biology

Lysine acetylation & Detyrosylation are found only on α-tubulin and are absent from β-tubulin.