These data imply that significant changes in Env spike structure are dependent upon precursor gp160 cleavage and are consistent with a restricted-binding-to-Env model of neutralization.
We postulated that anti-HIV-1 antibodies primarily bind monovalently because HIV's low spike density impedes bivalent binding through inter-spike crosslinking, and the spike structure prohibits bivalent binding through intra-spike crosslinking.
The absorption of spike structured silicon wafer reaches 94%, which is much higher than that of other structures such as penguin-like, pillars and pyramids, even the absorption of a flat silicon wafer is only 65%.
A cluster of promising epitopes for the development of human immunodeficiency virus (HIV) vaccines is located in the membrane-proximal external region (MPER) of the gp41 subunit of the HIV envelope spike structure.
The appearance of the 7.5 kb structure coincides with the formation of the spike structure in 2D gels (Fig. 5).
This is also agreed with the early reports that E2 glycoprotein contains more potent antigenic epitope clusters and receptor-binding sites than does E1 glycoprotein, while E1 glycoprotein in the center of the spike structure is coated by E2 glycoprotein [31], [32].
The overall phage morphology is summarized in Fig. 2, but aspects of the tail spike structure require further investigation for each phage.
The uniforms were cleaned and ready: dress blue with red sashes, white gloves, black patent-leather shoes, and helmets with "pickelhauben mit spitzen" -- literally translated as pickle stabbers with spikes, structures that stick up from the helmets.
This suggests that the secretin complex changes its conformation upon interaction with the pilus resulting in assembly of the extending spike-like structures or that the spike-like structures are formed by a protein transported across the outer membrane along with the extension of the pilus.
As shown in figure 4A, a fraction of L-plastin colocalized with cortactin in PMA-treated MCF-7 cells, mainly in ruffling membranes (Fig. 4A, upper and middle panels) and, at a lower extent, in the membranous area where the spike-like structures protrude but not along the spikes themselves (Fig. 4A lower panels).
