Actin polymerization in vitro proceeds in three steps:

1.Nucleation phase

2.Elongation phase

3.Steady-state

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NodD proteins interact directly with the signals generated by the plants and activates most conserved Nod ABC genes in bacteria

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Positive assortative mating refers to a tendency for like individuals to mate. For example, humans exhibit positive assortative mating for height.

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His ionisation series

1------pK1-----pKr--------pKr------14