Lecture 20 Cell-cell interactions then internal membrane systems

Lecture 20 Cell-cell interactions then internal membrane systems

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Lecture 20 Cell-Cell Junctions Different types of junctions, their structure, their function Plant Cell Walls Structure Junctions Internal Membrane Systems Methods of study
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Main Points Each of the cell-cell junctions has a specific role. Individual cells can be connected by several different types. Plant cell walls are composed of different types of materials compared to animal cell matrices, some similarities in overall structure Working out roles of membrane systems was based on approaches that ultimately linked structure and function
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Cell-Cell Attachments are Based on Different Classes of Protein Three major classes Selectins – bind to specific sugars on adjacent cell Immunoglobulin superfamily (IGSF)– bind to each other – Ca ++ independent Cadherins – bind to each other – Ca ++ dependent All three allow for specific cell-cell interaction in forming tissues 0
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Cell-Cell Junctions Several distinct types Attachment junctions
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Lecture 20 Cell-cell interactions then internal membrane systems

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