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Table 6 Presence (+) and absence (−) of genes related to vitamin B-12 uptake in mammals, gastric teleosts and ballan wrasse

From: Loss of stomach, loss of appetite? Sequencing of the ballan wrasse (Labrus bergylta) genome and intestinal transcriptomic profiling illuminate the evolution of loss of stomach function in fish

  

Mammals

Gastric teleosts

Ballan Wrasse

GIF

gastric intrinsic factor

+

–

–

TCN1

Transcobalamin 1

+

–

–

TCN2

Transcobalamin 2

+

+

+

TCN-like

Transcobalamin like

–

+

+