Class II MHC transcriptional activator called CIITA and another transcription factor called RFX, have both been shown to activate the promoter of class II MHC genes.

Defects in these transcription factors cause one form of bare lymphocyte syndrome.

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#Id: 10656

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Meristematic tissue

It is simple tissue

Actively dividing cell

cell wall of its cells is thin and elastic

Intercellular space absent

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#Id: 10657

#XL - R Botany

Meristematic tissue

they are immature cells

Vacuoles are absent

nucleus of each cell of this tissue is large and prominent

Cytoplasm is dense

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#Id: 10658

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Permanent tissue

It can be simple, complex or specialized

Cells donot divide further

Cell wall of its cells may either thin or thick

Intercellular spaces are often present

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#Id: 10659

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Permanent tissue

they will undergo differentiation to perform specific function

they are mature cells

Large central vacuole occur in living permanent cells

nucleus of each cell of this tissue is less conspicuous

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#Id: 10660

#XL - R Botany

On  the  basis  of  position

TLS Online TPP Program

#Id: 10661

#XL - R Botany

Apical meristem

Located  at  root  and  shoot  tips and produce primary tissues are called apical meristems