HEADER STRUCTURAL PROTEIN 31-DEC-69 7PQC TITLE tau-microtubule structural ensemble based on CryoEM data COMPND MOL_ID: 2; COMPND 2 MOLECULE: Tubulin alpha-1B chain; COMPND 3 CHAIN: B, D, F, H, J, L, N; COMPND 4 ENGINEERED: YES; EXPDTA ELECTRON MICROSCOPY