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TLS Online TPP Program

#Id: 8032

Ornithine and citrulline, which are not found in proteins, are intermediates in the biosynthesis of arginine and in the urea cycle.


#Section 2: General Biology #Amino Acids #Part B Pointers
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TLS Online TPP Program

#Id: 8129

#Section 2: General Biology

Some other biologically active isoprenoid compounds or derivatives.
TLS Online TPP Program

#Id: 8127

#Section 2: General Biology

β-Carotene is the precursor of vitamin A1.
Oxidation at C-15 converts retinol to the aldehyde, retinal, and further oxidation produces retinoic acid, a hormone that regulates gene expression. 
TLS Online TPP Program

#Id: 8126

#Section 2: General Biology
TLS Online TPP Program

#Id: 8125

#Section 2: General Biology

Steroids derived from cholesterol.
TLS Online TPP Program

#Id: 8120

#Section 2: General Biology

Arachidonic acid and some eicosanoid derivatives.
TLS Online TPP Program

#Id: 8119

#Section 2: General Biology

The triterpenes are C30 terpenes and include squalene and lanosterol, two of the precursors of cholesterol