BIOLOGY 1A03 Lecture Notes - Lecture 3: Progenitor Cell, Cpg Site, Histone Deacetylase

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

The signals that are exchanged and which genes are turned on or off at certain times. Leads to altered proteomes which leads to different cellular functions. Variation in specialized cell types: dependent on differentiation that occurs from common stem cells during early development, specific gene expression patterns within dividing embryonic stem cells and extracellular cues lead to variation. Transcription factors: transcription factors (proteins that bind to specific sequences in dna) contribute to gene regulation. Result: play essential roles in determining the pathway that a specific cell type will follow and determines the final mature cell type forms: control which genes are active. Result: certain proteins can only be found in specific cells, leading to variation. In prokaryotes, genes with similar functions are clustered together into operons that are then transcribed by a single promoter. In eukaryotes, each gene is controlled by its own promoters.