I've been thinking about making a sour and harvesting lacto from a yogurt culture. I read this post where OP used a unique drink called Bio-Salud to get some lacto bugs but he said that the culture contains L. acidophilus.
While reading the side of my yogurt cup I found the culture contains L. bulgaricus, S. thermophilus, L. acidophilus, B. bifidus, and L. casei. I'm noticing that the yogurt I have in my fridge is missing L. acidophilus. I went to White Labs' and Wyeast's site, they did not list the strains of lacto.
I'm thinking that the culture from my yogurt cup won't be a sour as because its missing L. acido. Am I correct in thinking this? Any one had any experience or at least know the strains in the lacto brewing cultures?