specifically , n-methyl-n'-nitro-n-nitrosoguanidine transformation of hos cells into highly tumorigenic cells results in a significant specific increase in the expression of ( in descending order of level of cell surface expression ) the integrins alpha 6/beta 1 , alpha 2/beta 1 , and alpha 1/beta 1 , which are receptors for laminin , collagens , and collagen type iv and laminin , respectively .
C0009325
collagens
C0009333
collagen type iv