(A) Electron micrographs of ALM neurons in mec-17 and mec-17-atat-2 mutant animals expressing the enzymatically inactive mec-17(dW). Scale bars throughout = 100 nm. Left panel had HPF using 1.5% tannic acid + 0.5% glut; right panel used HPF in osmium/acetone (no tannic acid).
(B) Tannic acid stained mec-17;mec-17(dW), and mec-17;atat-2;mec-17(dW) mutant MTs containing 13-p, 14-p and 15-p protofilaments. HPF using 0.25% tannic acid + 0.5% glut.