Accidentally sent bitcoin from MSC address

[OTK47]

Hi guys, so I bought some mastercoins (MSC) and sent them to an address on my blockchain.info account. I then sent bitcoins from my wallet, but forgot to do a custom send and accidentally sent the fraction of a bitcoin that went into my MSC address when I received them. I don't know much about how it works. So can someone explain to me whether I will now be able to send my MSCs from this address? They still show up on Mastercoin explorer but I'm just worried about retrieving them. Thanks.