Snail shells coil in response to a lopsided protein gradient across their shell mantles, finds new research. In contrast the shell mantle of limpets, whose shells do not coil, have a symmetrical ...

Figure 2: nodal and Pitx expression in snails. We also followed the development of some of the animals with straight shells over the course of several days. We found that these animals continued to ...

'Left-handed' and 'right-handed' shells of giant pond snails, Lymnaea stagnalis. ((Kuroda Laboratory)) Japanese researchers have created mirror-image snails whose shells coil in the opposite direction ...