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Related Concept Videos

Barriers to Effective Communication II01:21

Barriers to Effective Communication II

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The barriers to effective communication also include cultural barriers, semantic barriers, gender barriers, and time constraints.
Cultural barriers:
Differences in values, beliefs, religion, knowledge, and tradition can significantly impact communication. Awareness of nonverbal cues is critical, especially when conversing with a patient from a different culture. What appears appropriate in one culture may be inappropriate in another.
Semantic barriers:
As a result of their tendency to use...
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Barriers to Effective Communication I01:30

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A communication barrier is any distortion or interruption during a conversation, resulting in miscommunication of the message. A good communicator should know these barriers and continuously check for the listener's understanding by obtaining feedback.
Communication barriers include the following:
Physiological barriers: They are limitations caused by a person's health condition or disability, such as hearing loss, poor eyesight, illness, or unconsciousness. An example to overcome this...
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Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

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Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
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Phosphoinositides and PIPs01:42

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Phosphoinositides are a group of phospholipids containing a glycerol backbone with two fatty acid chains and a phosphate attached to a myoinositol sugar ring. The inositol head group extends into the cytoplasm, where it is modified by adding phosphate groups to form phosphatidylinositol phosphates or PIPs.
Different phosphoinositides are synthesized and recruited on the cytosolic face of the plasma membrane. The localization of specific phosphoinositides concentrated in separate membrane...
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IP3/DAG Signaling Pathway01:11

IP3/DAG Signaling Pathway

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Membrane lipids such as phosphatidylinositol (PI) are precursors for several membrane-bound and soluble second messengers. Specific kinases phosphorylate PI and produce phosphorylated inositol phospholipids. One such inositol phospholipids are the  phosphatidylinositol-4,5 bisphosphate [PI(4,5)P2], present in the inner half of the lipid bilayer. Upon ligand binding, GPCR stimulates Gq proteins to turn on phospholipase Cꞵ. Activated phospholipase Cꞵ cleaves PI(4,5)P2 and...
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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
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Related Experiment Video

Updated: Apr 14, 2026

Co-immunoprecipitation Assay for Studying Functional Interactions Between Receptors and Enzymes
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Co-immunoprecipitation Assay for Studying Functional Interactions Between Receptors and Enzymes

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Prohibitin 2: At a communications crossroads.

Alberto Bavelloni1,2, Manuela Piazzi3, Mirco Raffini2

  • 1Laboratory of Musculoskeletal Cell Biology, Rizzoli Orthopedic Institute, Bologna, Italy.

IUBMB Life
|April 24, 2015
PubMed
Summary
This summary is machine-generated.

Prohibitins (PHBs) are key proteins regulating cell functions and diseases. This review highlights prohibitin 2 (PHB2), detailing its roles both alone and with prohibitin 1 (PHB1).

Keywords:
AKTAlzheimer'sCaMK IVcancerdiabetesdifferentiationgene regulationinflammationmitochondriamyositisnucleusplasma membrane receptorsprohibitinstresstranscription

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Prohibitins (PHBs) are conserved proteins involved in cell proliferation, transcription, signaling, and metabolism.
  • PHBs regulate critical cellular processes and are implicated in diseases like cancer and neurodegeneration.
  • The human genome contains two PHB proteins: PHB1 and PHB2, which can form a complex or act independently.

Purpose of the Study:

  • To review the cellular functions of prohibitin 2 (PHB2).
  • To present new data on PHB2's roles, both in complex with PHB1 and independently.
  • To shift focus from the well-studied PHB1 to the under-explored PHB2.

Main Methods:

  • Literature review of existing and new data on PHB2.
  • Analysis of PHB2's molecular functions.
  • Examination of PHB2's involvement in cellular processes and pathologies.

Main Results:

  • PHB2 plays significant roles in transcription, nuclear signaling, mitochondrial integrity, cell division, and membrane metabolism.
  • PHB2 functions effectively as part of a heterodimeric complex with PHB1.
  • Emerging evidence shows PHB2 also exerts crucial functions independently of PHB1.

Conclusions:

  • PHB2 is a critical regulator of fundamental cellular processes.
  • Understanding PHB2's dual function (complexed and independent) is vital for comprehending its role in health and disease.
  • Further research into PHB2 is warranted due to its implications in various pathologies.