What are these granules type small structures? - (Dec/20/2010 )

This is a mouse myobalst cell culture photo downloaded from internet. I am wondering what are these granules type small structures pointed with red arrows? Because this also occured in my cells and interfere the background. Thanks very much!

Tony

look like dying cells to me.

Thanks a lot for your reply!

I think they are microglial cells. They are smaller and partner cells of astrocytes. You usually have them w astrocytes. However, ATCC is a very good quality of cells so.... I know bc I work there :-)

However, these are myoblasts not astrocytes...