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Cell Communication
Cell Communication

... Epinephrine (Adrenaline) stimulates G-Proteins • Many G-proteins stimulate Adenylyl cyclase, which triggers the formation of cAMP, which then acts as a second messenger in cellular pathways First messenger (signal molecule such as epinephrine) G protein ...
2015 Midterm Study Guide
2015 Midterm Study Guide

... Significance of using operons - Why have bacteria that have operons continue to remain in existence What genes are always turned on? (examples) Eukaryotic Gene Expression Why are there multiple points of gene regulation? Why is it essential that multicellular organisms have tightly regulated gene ex ...
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... communication across tissues during development. For example, during angiogenesis in zebrafish embryos, vascular endothelial growth factor (VEGF) secreted by muscle controls the expansion and remodelling of the vascular network. The precise regulation of VEGF expression in muscle cells is therefore ...
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PDF

... communication across tissues during development. For example, during angiogenesis in zebrafish embryos, vascular endothelial growth factor (VEGF) secreted by muscle controls the expansion and remodelling of the vascular network. The precise regulation of VEGF expression in muscle cells is therefore ...
Model Description Sheet
Model Description Sheet

... into drugs’ addictive trap, such as former NFL quarterback Brett Favre. The addictiveness of painkillers such as OxyContin and Vicodin is largely attributed to the response they trigger in proteins such as mu opioid receptors (MOPs). This receptor activates cellular signaling pathways responsible fo ...
Exam 2 Answers
Exam 2 Answers

... 1. (2 points) What is the term for short-range cell-cell communication via secreted local mediators that act on adjacent cells? (A) Endocrine signaling (B) Paracrine signaling (C) Contact-dependent signaling (D) Delta-Notch signaling 2. (2 points) A small molecule that is formed in the cytosol, or r ...
The Red Blood Cells
The Red Blood Cells

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Major Organic Groups - Lemon Bay High School
Major Organic Groups - Lemon Bay High School

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... is tightly regulated by the Mdm2 protein via a negative feedback loop so that the p53 protein level is low. p53 is an activator of Mdm2 expression whereas Mdm2 binds binds the p53 protein and negatively controls its transcriptional activity as well as stability. Under cellular stress, the negative i ...
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... Many hormones and other signal molecules trigger the formation of cAMP.  G-protein-linked receptors, G proteins, and protein kinases are other components of cAMP pathways.  cAMP diffuses through the cell and activates a serine/threonine kinase called protein kinase A.  The activated kinase phosph ...
Slide 1 - ParklandNatSciWiki
Slide 1 - ParklandNatSciWiki

... • Signaling molecule • Binds noncovalently to receptor with high degree of specificity • Binding and release between receptor and ligand relatively rapid • Ligands alter receptor structureconformational change • Once a ligand is released, the receptor is no longer activated ...
CELL AND DEVELOPMENTAL BIOLOGY SUBTRACK
CELL AND DEVELOPMENTAL BIOLOGY SUBTRACK

... RNA production and processing, small RNAs, RNAi and genetic and epigenetic regulation. Instruction will include didactic and small group sessions, with discussion of primary research publications. 156:202 Fundamentals of Protein Regulation 1 s.h. This course will cover topics of protein structure, p ...
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... • Complement is a group of serum proteins – activated in an orderly fashion from inactive forms. This leads to “spin-off” peptides that have biological activity. • Three main activation pathways and one terminal pathway that leads to the formation of the MAC. • Complement activation is highly regula ...
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CHAPTER-III CARBOHYDRATE METABOLISM
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... The citriic acid cyclle — also knnown as thee tricarboxyylic acid cyycle (TCA cycle), c the Krebs K cycle, or the Szent-G Györgyi–Krrebs cycle — is a series of chemical reactions ussed by all aeerobic ...
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... One of the longevity genes discovered encodes a protein called SIRT1, which is 1 of 7 proteins. These proteins are known as a class III histone deacetlyase, which means that they use NAD+ to remove Lysine acetyl from proteins or histones. Eventually the function of SIRT6 was discovered by researcher ...
AP Biology Midterm Studyguide 2017
AP Biology Midterm Studyguide 2017

... 2. solve for q first! Why? How? 3. does the problem give you the phenotype frequency or the genotype frequency of the population? 4. does the problem give you exact number of individuals or percentage of individuals? N: YIF, HOX genes, tissue development in an organism due to signals. Anterior vs. p ...
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... In the final steps of RTK-Ras/MAP kinase signaling, MAP kinase phosphorylates and activates the p90RSK kinase in the cytoplasm (Fig. 16.22). Both kinases enter the nucleus where they phosphorylate ternary complex factor (TCF) and serum response factor (SRF), respectively. The phosphorylated forms of ...
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Nerve activates contraction

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... expression array revealed that the expressions of several apoptosis- and growth-associated genes were altered underlying the molecular mechanisms of these cell biological behaviors. ...
Division of Morphogenesis
Division of Morphogenesis

... of nectin-2, one of the nectin family members, from early embryos resulted in incomplete neural fold formation. Cellular analyses revealed less accumulation of F-actin at the apical surface, causing an aberrant apical constriction, a cellshape change that is required for neural tube folding. Further ...
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Biochemical cascade

A biochemical cascade (or a signaling pathway) is a series of chemical reactions which are initiated by a stimulus (first messenger) acting on a receptor that is transduced to the cell interior through second messengers (which amplify the initial signal) and ultimately to effector molecules, resulting in a cell response to the initial stimulus. At each step of the signaling cascade, various controlling factors are involved to regulate cellular actions, responding effectively to cues about their changing internal and external environments.
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