Examples of phenomena involved in this High Irradiance Response (HIR) include: 

• anthocyanin synthesis in seedlings and apple skins

• inhibition of hypocotyl elongation in mustard, lettuce and petunia

• plume hook opening in lettuce

• cotyledon enlargement in lettuce

• ethylene production in sorghum

TLS Online TPP Program

#Id: 452

#Unit 2. Cellular Organization

Lysine  in the histone tails are the most common targets of modification.

TLS Online TPP Program

#Id: 453

#Unit 2. Cellular Organization

Acetylation, methylation, ubiquitylation, and sumoylation all occur on the free epsilon amino group of lysine.

TLS Online TPP Program

#Id: 454

#Unit 2. Cellular Organization

Acetylation neutralizes the positive charge of lysine so disrupts DNA Histone interactions.

TLS Online TPP Program

#Id: 455

#Unit 2. Cellular Organization

lysine methylation retains the positive charge, and lysine can be mono-, di-, or trimethylated.

TLS Online TPP Program

#Id: 456

#Unit 2. Cellular Organization

Histone codes are specific and conserved residues that undergoes to modification and changes expression of chromatin.

TLS Online TPP Program

#Id: 457

#Unit 2. Cellular Organization

Histone tail modifications