The biosynthesis of chlorophylls and heme begins with the synthesis of δ‐aminolevulinic acid (ALA) from glutamic acid. 

Two molecules of ALA react to yield porphobilinogen (PBG). 

Four molecules of PBG form the ring structure of protoporphyrin IX, the common branch point for the synthesis of heme and chlorophyll. 

To make chlorophyll, a magnesium chelatase inserts Mg into the protoporphyrin IX ring

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#Unit 6. System Physiology – Plant

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#Id: 8359

#Unit 2. Cellular Organization

In Golgi complex

Arp2/3-dependent assembly of actin occur by an NPF WHAMM participating in membrane traffic from the ER to golgi

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#Id: 7603

#Unit 5. Developmental Biology

Two important acrosomal proteins  acrosin and MMP2 (matrix metaloproteinase-2)

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#Unit 8. Inheritance Biology

Genomic imprinting, differential expression of a gene that depends on the sex of the parent that transmitted the gene.

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#Unit 3. Fundamental Processes

Deletion of the ter sites does not, however, prevent normal replication cycles from occurring, although it does affect segregation of the daughter chromosomes.