The phrase "a bands" is not correct in written English.
It appears to be a grammatical error, as "bands" is a plural noun and should not be preceded by the singular article "a."
Example: "I saw a band performing at the festival."
Alternatives: "a group" or "a musical ensemble."
In frog muscle the transverse tubules surround the myofibril at the level of each Z line, and in mammalian muscles they are located at the edge of the A bands and I bands.
He and his colleagues also showed that antibodies to MyBP-C formed nine 43 nm striations on each side of the A bands of muscle fibers.
The apparent maximum in the contours at 15 K and ~1850 cm -1 is artificial and results from the superposition of the A bands and the photoproduct bands (compare Figure 5).
Figure 3 displays the contour maps obtained after 10-s illumination at 4 K, with the absorption changes in the A bands and the photoproduct bands in the left and right columns, respectively.
Interestingly, these bands are about as strong as the A bands, which strongly suggests that they do not represent unbound NO trapped in a transient docking site but rather heme-bound NO with restricted librational freedom.
To gain additional information on the peculiar, strongly absorbing NO photoproduct bands, TDS experiments were started immediately after illuminating NO-ligated samples at 4 K. Figure 6 displays the absorption changes in the A bands and in the photoproduct bands with solid and dotted lines, respectively.
Overall, we identified three transcriptionally active MINEs in M. grisea: MINE-A (bands 1 and 5), MINE-B (bands 2 and 4) and MINE-C (band 3) that correspond, respectively, to the elements 4, 10 and 3 we identified in the M. grisea genome (Additional file 1; GenBank accession numbers EF585235– EF585235).
In a cross-section through the A-bands of vertebrate striated muscles, the myosin filaments lie on a hexagonal lattice, and the actin filaments are at the trigonal points, midway between three mutually adjacent myosin filaments.
Collectively, our experiments identify a new ligand of obscurin at the M-band, MyBP-C slow variant-1 and suggest that their interaction contributes to the assembly of M- and A-bands.
Immunolabeling of skeletal myofibers with antibodies to the unique COOH terminus of variant-1 demonstrated that, unlike other forms of MyBP-C slow that reside in the C-zones of A-bands, variant-1 preferentially concentrates around M-bands, where it codistributes with obscurin.
In C3KO mice, abnormal A-bands were seen, suggesting a role for calpain 3 in correct formation of sarcomeres or maintenance of sarcomere alignment [14].
