Carbonic anhydrase generates CO2 and H+ that drive spider silk formation via opposite effects on the terminal domains
PLoS Biology (2014) - Comment
pubmed: 25093327  doi: 10.1371/journal.pbio.1001921  issn: 1545-7885 

Marlene Andersson, Gefei Chen, Martins Otikovs, Michael Landreh, Kerstin Nordling, Nina Kronqvist, Per Westermark, Hans Jörnvall, Stefan Knight, Yvonne Ridderstråle, Lena Holm, Qing Meng, Kristaps Jaudzems, Mitchell Chesler, Jan Johansson, Anna Rising