SAN FRANCISCO - A prominent Silicon Valley venture capitalist who helped direct early investments in Google and Amazon said Tuesday during testimony in a high-profile sex discrimination lawsuit that his firm is not run by men and has many female senior partners. Doerr - a billionaire and partner at the firm, which also counts former Vice President Al Gore among its partners - said he did not recall telling an investigator that women were at a disadvantage at Kleiner Perkins because of the sheer number of men who dominate the venture capital industry and that the firm was run by men. Venture capital firms, which provide much of the startup funds for tech companies, have a reputation as being even more insular and male-dominated than the companies they help launch.