6.1.1.13	ATP + D-alanine + poly(ribitol phosphate) = AMP + diphosphate + O-D-alanyl-poly(ribitol phosphate)	A thioester bond is formed transiently between D-alanine and the sulfhydryl group of the 4'-phosphopantetheine prosthetic group of D-alanyl carrier protein during the activation of the alanine. Involved in the synthesis of teichoic acids	-