Moreover, the epithelial cells of JE secrete that protein as a line on the interface with the enamel, what was considered specific to this basal lamina [...]
Could "what" be substituted for "which"? The idea is that the fact of those epithelial cells secreting the protein under discussion as a line on the interface with the enamel was considered specific to the basal lamina under analysis.
Or, in a simpler sentence:
People put all kinds of personal information on the Internet, what can be really dangerous.
The idea is of using "what" as a summary of the whole previous sentence. Which wh-word is the correct one in this situation?
Thanks. That's what I thought, but I wasn't sure. The question came to my mind when I read the first sentence. I created the second just to exemplify, in case the too technical original sentence might be confusing.