GO:0035583:   sequestering of TGFbeta in extracellular matrix
Confining TGFbeta to the extracellular matrix (ECM) such that it is separated from other components of the signaling pathway, including its cell surface receptor. TGFbeta is secreted as part of a latent complex that is targeted to the extracellular matrix through latent-TGFbeta-binding protein (LTBP)-mediated association with matrix proteins.