3.13. CAB as a source of cyanocobalamin synthesising prokaryotes
Among the CAB of the five copepod genera analysed, the following was the descending order of copepod genera based on their relative proportion of potential cobalamin synthesising gene: Temora spp.,Acartia spp., Calanus spp., Pleuromamma spp., andCentropages sp. (Figure. S7).
However, from the present study, high proportions of cobalamin synthesising genes in the CAB of Temora spp. might be due to the presence of genus Nitrosopumilus (phyla Thaumarchaeota ). We found that the CAB might also be one of the potential sources of cyanocobalamin production in the ocean.
The limitation of the present study could be related to the fact that all the CAB sequences were from the Atlantic Ocean.