Recombinant protein of human F

Size and Shape of Protein Molecules at the Nanometer Level Determined by Sedimentation, Gel Filtration, and Electron Microscopy

. However, some proteins are highly elongated, either as a string of small globular domains or stabilized by specialized structures such as coiled coils or the collagen triple helix. The ultimate structural understanding of a protein comes from an atomic-level structure

细胞渗透蛋白（CPP）

binding domains, including SH2, SH3 [15], BH3 [16] and peptides that mimic DNA binding sequences, have been fused to CPP [17], thus enabling their entry into the cytoplasm. The introduced protein domain homologs can inhibit protein binding or protein