Hallmann A, Godl K, Wenzl S, Sumper M
Universität Regensburg, Lehrstuhl Biochemie I, Germany.
Trends Microbiol. 1998 May;6(5):185-9. doi: 10.1016/s0966-842x(98)01234-7.
The green alga Volvox is one of the simplest multicellular organisms and is capable of both asexual and sexual reproduction. Sexual development is initiated by a glycoprotein pheromone that acts at a concentration below 10(-16) M. The extracellular matrix (ECM) appears to play a key role in signal amplification: several ECM proteins contain a domain with homology to the sex-inducing pheromone.