How to buy NEO on Bittrex

I registered on Bittrex recently. I know that this platform support a lot of different altcoins. I suppose that NEO is one of them. If so tell me please guys how to buy NEO in a most convenient way for fiat money. I mean with little commissions and other additional expenses. I will buy for dollars first of all. Are there any specific features in a process of purchasing NEO coins. I will be glad to get your answers. Thanks a lot to all who will respond.