<;P>;PROBLEM TO BE SOLVED: To provide a new kind of laminin molecule that supports adhesion, migration, survival and the like of a cell and therefore performs important functions for the construction of a tissue. <;P>;SOLUTION: The laminin 6B protein is constituted of a subunit of a laminin &alpha;3B chain, a &beta;1 chain and a &gamma;1 chain. The protein exhibits cell proliferation activities, cell adhesion activities and cell movement activities. <;P>;COPYRIGHT: (C)2008,JPO&INPIT