Talk with your caregiver about the best time to wean your baby. 1  Introducing solid foods: Weaning should begin when your baby is about 6 months old.  Weaning from breast milk: Your baby needs nutrients from breast milk until he is at least 12 months old.
Enzyme-linked secondary antibodies are applied as detection antibodies that also bind specifically to the antibody's Fc region (nonspecific). The plate is washed to remove the unbound antibody-enzyme conjugates. A chemical is added to be converted by the enzyme into a color or fluorescent or electrochemical signal.
The alternative complement pathway does not require antibody to initiate the lysis of bacteria. In this pathway, complement proteins from a complex known as C3 directly bind to bacteria and activate downstream components in the complement cascade, once again ending in formation of MAC that causes lysis of the bacterium.