Split string by upper/lower case

Hi

I have a number of cells that contain poorly punctuated text. Here's an example:

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliquaUt enim ad minim veniam...

there are several instances of a lower case word being joined by the first word in the following sentence without space or punctuation.

e.g.

endStart

when it should be

end. Start

Ideally, I'd like to split such strings into separate cells. Alternatively, inserting ". " between the lower and upper case characters might do the job.

Any ideas how this could be done?

Thanks