There are major proteins...
There are major proteins in most living organisms. One group is called laminins. One of their basic functions is to provide adhesion that keeps a cell together as a cell and then keeps cells together as tissues and organs. It is most interesting to note that the structure of laminins are in the shape of crosses. Laminins are vital to maintain tissues. Like a biological, aesthetic teaser, laminins give visual expression by their cross-shaped structure to the bonding Paul is talking about when he writes that in Christ "all things hold together."