TY - RPRT TI - NF-I/Sp1 switch elements regulate collagen alpha 1(I) gene expression. AU - M C Nehls AU - M L Grapilon AU - D A Brenner DO - 10.1089/dna.1992.11.443 UR - https://pubmed.ncbi.nlm.nih.gov/1524678/ ID - 1524678 ER -