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Related Concept Videos

Polytene Chromosomes02:04

Polytene Chromosomes

Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also regularly...
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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Nuclear Protein Sorting

Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
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Amines: Introduction01:07

Amines: Introduction

Amines are organic derivatives of ammonia. They are formed by replacing one or more ammonia protons with alkyl or aryl groups. Depending upon the number of organyl groups bonded to nitrogen, amines are classified as primary, secondary, or tertiary. Primary amines have one organyl group attached to the nitrogen atom, while secondary and tertiary amines have two and three organyl groups attached to the nitrogen atom, respectively.
Next-generation Sequencing03:00

Next-generation Sequencing

The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...

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Related Experiment Video

Updated: Jun 16, 2026

Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles (PPAs) and Related Biomaterials
08:55

Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles (PPAs) and Related Biomaterials

Published on: June 25, 2018

The polyamines: past, present and future.

Heather M Wallace1

  • 1Division of Applied Medicine, University of Aberdeen, Aberdeen, Scotland, UK. h.m.wallace@abdn.ac.uk

Essays in Biochemistry
|January 26, 2010
PubMed
Summary
This summary is machine-generated.

Polyamines like spermidine and spermine are vital for cell growth and survival across all species. Research highlights their critical roles and potential as therapeutic targets for diseases such as cancer.

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Facile Protocol for the Synthesis of Self-assembling Polyamine-based Peptide Amphiphiles (PPAs) and Related Biomaterials
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Assaying for Inorganic Polyphosphate in Bacteria
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Assaying for Inorganic Polyphosphate in Bacteria

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Polyamines, including spermidine and spermine, were discovered in 1678 and their biosynthetic pathways elucidated in the early 20th century.
  • These molecules are fundamental for cellular life, essential for optimal cell growth and survival.
  • Cells lacking endogenous polyamine production require external sources for viability.

Observation:

  • Despite their essential nature, polyamines receive limited attention in broader scientific literature and standard textbooks.
  • Over 75,000 research papers exist on polyamines since 1900, with a significant increase (54%) published after 1990.
  • Comprehensive resources like Seymour Cohen's "The Guide to the Polyamines" detail their extensive properties.

Findings:

  • Polyamines are indispensable for cell proliferation and viability.
  • Inhibition of polyamine synthesis necessitates exogenous supply for cell survival.
  • A substantial body of research underscores the biological significance of polyamines.

Implications:

  • The critical role of polyamines in cellular functions warrants greater recognition in biochemistry and cell biology.
  • Understanding polyamine metabolism offers potential for therapeutic interventions in diseases like cancer.
  • Further research into polyamines could unlock novel treatment strategies for various pathologies.