Japanese experts found B3 vitamin and uracil from the asteroid Ruygu samples.

Researchers at The University of Hokkaido found niacin and uracil in samples that Japan's Hayabusa2 probe brought from asteroid Ruygu. That thing supports the theory that elements of life came to Earth from comets and asteroids. There have been found amino acids before from meteorites, but those things claimed transferred to those meteorites from Earth. 

The findings from asteroid Ruygu are the key element in the next steps in the search origins of life. And if there are amino acids and uracil in the asteroid belt, that thing supports theories that there are more living planets and moons even in our solar system. Researchers can search for extraterrestrial lifeforms like bacteria from the oceans of Jupiter's and Saturn's moons. 

"A conceptual image for sampling materials on the asteroid Ryugu containing uracil and niacin by the Hayabusa2 spacecraft (NASA Goddard/JAXA/Dan Gallagher)". (https://www.global.hokudai.ac.jp/blog/uracil-found-in-ryugu-samples/)

Of course one suspected harbor for extraterrestrial bacteria is the asteroid Ceresd there seem to be some kinds of oceans. The weak gravitational field keeps water liquid at very low temperatures. So there is a possibility that there are many harbors for primitive lifeforms in our solar system. And of course there can be other places like water-rich moons or maybe some primitive bacteria can live in crystals where is water storage.

The amino acids are not bacteria. But they are important for life. If life came to Earth from outer space, that causes the question of where is the origin of those lifeforms. Are those asteroids that carry amino acids come from some other solar systems? Or is some kind of cosmic dust brought those chemical compounds to those asteroids?  

Maybe, someday we get an answer for that thing. If researchers can find bacteria or their remnants from asteroid belt they could compare those samples with microbes that live on Earth. And if those samples are similar, there is a possibility that the organisms living on those small worlds and our bacteria have the same origin. 

https://www.global.hokudai.ac.jp/blog/uracil-found-in-ryugu-samples/

https://www.republicworld.com/science/space/japan-experts-discover-amino-acids-in-asteroid-sample-fetched-by-hayabusa2-probe-articleshow.html

https://www.theregister.com/2022/06/07/japans_asteroid_probe_reportedly_found/