Bacterial kingdom

The distance between the two bacterial kingdoms is comparable to the distance that divides each of them from the eukaryotes ancestors (cells that Woese called urkaryotes). 

Heme peroxidases are found extensively throughout the plant, animal, and bacterial kingdoms. These enzymes catalyze the oxidation of a wide variety of organic and inorganic substrates, with the concomitant reduction of hydrogen peroxide or other hydroperoxides (ROOH) to water to alcohols (ROH), respectively ... 

Overall, one may observe that the NadM family reveals a high degree of functional versatility affording variations in both substrate specificity and physiological role. These variations are prominent within the bacterial kingdom where the members of the NadM family are sparsely distributed. This is in contrast with archaea where NadM appears to be a completely universal housekeeping enzyme in the main route of NAD synthesis (an archaeal equivalent of NadD). 

Dihydric phenolic lipids of the cardol type are the most abundant in plant, fungal and bacterial kingdoms. The first species in which the members of the title subclass of phenolic lipids, resorcinolic lipids, were found was Ginkgo biloba (Ginkgoaceae) [6,9,10,17]. Later, the presence of resorcinolic lipids (5-n-alk(en)ylresorcinols) was shown also in other species, first, in the Anacardiaceae [14], which is an important source of various phenolic lipids, not only of alkylresorcinols but also of alkylphenols and alkylcatechols. For example, the cashew and the processing of cashew nuts are the main source of phenolic lipids for the formaldehyde-polymer industry. Aspects of Anacardium occidentale in relation to synthesis, semi-synthesis and chemical industry have been reviewed Tyman [1,11,14] as well as a recent book [2]. 

The peptidoglycan polymer is not present in all members of the bacterial kingdom. It is possible to identify two important groups of bacteria which do not possess a true cell wall. 

This chiral polyalkanoate, based on D(-)g hydroxybutyric acid monomer, was discovered in the 1920 s and remained a microbiological fact while polymer chemists struggled with the likes of cellulose, natural rubber, and silk. However, like starch in the plant world, PHB is ubiquitous in the bacterial kingdom and serves exactly the same purpose. Figure 15 shows how the concentration of PHB in the cells builds up during the "log"phase of growth then drops rapidly, presumably being metabolised in relation to... 

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