Venture capital deals

August 1, 2012, 5:54 PM UTC

CytomX Therapeutics Inc., a San Francisco-based developer of proteolytically-activated antibodies, has expanded its Series B round by $11 million. The total round now stands at $41 million. Canaan Partners led the expansion, and was joined by return backers Third Rock Ventures and the Roche Venture Fund. www.cytomx.com

TribeHR, a Waterloo, Ontario-based provider of a social HR platform, has raised $2.5 million in new VC funding. Relay Ventures led the round, and was joined by Matrix Partners. www.tribehr.com

Shelby.tv, a New York-based video discovery app, has raised $2.2 million in new VC funding from return backers like Avalon Ventures. www.shelby.tv

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