<informationTable xmlns="http://www.sec.gov/edgar/document/thirteenf/informationtable">		<infoTable>
			<nameOfIssuer>23andMe Holding Co</nameOfIssuer>
			<titleOfClass>CLASS A COM</titleOfClass>
			<cusip>90138Q108</cusip>
			<value>44867</value>
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		<infoTable>
			<nameOfIssuer>Adagio Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>00534A102</cusip>
			<value>41242</value>
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				<sshPrnamt>5680785</sshPrnamt>
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		<infoTable>
			<nameOfIssuer>Alector Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>014442107</cusip>
			<value>3632</value>
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				<sshPrnamt>175866</sshPrnamt>
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				<Shared>175866</Shared>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>Amplitude Inc</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
			<cusip>03213A104</cusip>
			<value>10029</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>4</otherManager>
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		<infoTable>
			<nameOfIssuer>Arcus Biosciences Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>03969F109</cusip>
			<value>103742</value>
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			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>Autolus Therapeutics PLC</nameOfIssuer>
			<titleOfClass>SPON ADR</titleOfClass>
			<cusip>05280R100</cusip>
			<value>3624</value>
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		<infoTable>
			<nameOfIssuer>Beam Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>07373V105</cusip>
			<value>25629</value>
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		<infoTable>
			<nameOfIssuer>Benson Hill Inc</nameOfIssuer>
			<titleOfClass>COMMON STOCK</titleOfClass>
			<cusip>082490103</cusip>
			<value>107544</value>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>Compass Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>20454B104</cusip>
			<value>611</value>
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		<infoTable>
			<nameOfIssuer>Cortexyme Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>22053A107</cusip>
			<value>2387</value>
			<shrsOrPrnAmt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>6</otherManager>
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		<infoTable>
			<nameOfIssuer>Decibel Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>24343R106</cusip>
			<value>7609</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Shared>1636258</Shared>
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		<infoTable>
			<nameOfIssuer>Desktop Metal Inc</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
			<cusip>25058X105</cusip>
			<value>54691</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>Dexcom Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>252131107</cusip>
			<value>378026</value>
			<shrsOrPrnAmt>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>6</otherManager>
			<votingAuthority>
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				<Shared>704011</Shared>
				<None>0</None>
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		</infoTable>
		<infoTable>
			<nameOfIssuer>Duolingo Inc.</nameOfIssuer>
			<titleOfClass>CL A COM</titleOfClass>
			<cusip>26603R106</cusip>
			<value>15327</value>
			<shrsOrPrnAmt>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<votingAuthority>
				<Sole>0</Sole>
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		<infoTable>
			<nameOfIssuer>Enjoy Technology Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>29335V106</cusip>
			<value>20076</value>
			<shrsOrPrnAmt>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>4</otherManager>
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		<infoTable>
			<nameOfIssuer>EQRX Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>26886C107</cusip>
			<value>322263</value>
			<shrsOrPrnAmt>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>EQRX Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>26886C107</cusip>
			<value>2046</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>6</otherManager>
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		<infoTable>
			<nameOfIssuer>Evelo Biosciences Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>299734103</cusip>
			<value>6437</value>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Sole>0</Sole>
				<Shared>1060495</Shared>
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		<infoTable>
			<nameOfIssuer>Exact Sciences Corp</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>30063P105</cusip>
			<value>1806</value>
			<shrsOrPrnAmt>
				<sshPrnamt>23205</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>6</otherManager>
			<votingAuthority>
				<Sole>0</Sole>
				<Shared>23205</Shared>
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		<infoTable>
			<nameOfIssuer>Foghorn Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>344174107</cusip>
			<value>11456</value>
			<shrsOrPrnAmt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>Freshworks Inc</nameOfIssuer>
			<titleOfClass>CLASS A COM</titleOfClass>
			<cusip>358054104</cusip>
			<value>50981</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>3</otherManager>
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				<Shared>1941391</Shared>
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		<infoTable>
			<nameOfIssuer>Freshworks Inc</nameOfIssuer>
			<titleOfClass>CLASS A COM</titleOfClass>
			<cusip>358054104</cusip>
			<value>54994</value>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
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		<infoTable>
			<nameOfIssuer>Fulcrum Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>359616109</cusip>
			<value>4267</value>
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		<infoTable>
			<nameOfIssuer>Fulcrum Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>359616109</cusip>
			<value>252</value>
			<shrsOrPrnAmt>
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				<sshPrnamtType>SH</sshPrnamtType>
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		<infoTable>
			<nameOfIssuer>Hyperfine Inc</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
			<cusip>44916K106</cusip>
			<value>6516</value>
			<shrsOrPrnAmt>
				<sshPrnamt>898720</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Shared>898720</Shared>
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		<infoTable>
			<nameOfIssuer>Ideaya Biosciences Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>45166A102</cusip>
			<value>17805</value>
			<shrsOrPrnAmt>
				<sshPrnamt>753187</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
			<votingAuthority>
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		<infoTable>
			<nameOfIssuer>Illumina Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>452327109</cusip>
			<value>20342</value>
			<shrsOrPrnAmt>
				<sshPrnamt>53470</sshPrnamt>
				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Shared>53470</Shared>
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		<infoTable>
			<nameOfIssuer>Invitae Corp</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>46185L103</cusip>
			<value>3300</value>
			<shrsOrPrnAmt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>6</otherManager>
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		<infoTable>
			<nameOfIssuer>IonQ Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>46222L108</cusip>
			<value>365848</value>
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		<infoTable>
			<nameOfIssuer>Kronos Bio Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>50107A104</cusip>
			<value>19546</value>
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				<sshPrnamtType>SH</sshPrnamtType>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>Lyell Immunopharma Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>55083R104</cusip>
			<value>45396</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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		<infoTable>
			<nameOfIssuer>Lyft Inc</nameOfIssuer>
			<titleOfClass>CL A COM</titleOfClass>
			<cusip>55087P104</cusip>
			<value>262283</value>
			<shrsOrPrnAmt>
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			<otherManager>2</otherManager>
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				<Shared>6138154</Shared>
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		<infoTable>
			<nameOfIssuer>Magenta Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>55910K108</cusip>
			<value>14792</value>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Shared>3339138</Shared>
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		<infoTable>
			<nameOfIssuer>Monte Rosa Therapeutics Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>61225M102</cusip>
			<value>29895</value>
			<shrsOrPrnAmt>
				<sshPrnamt>1464015</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
			<otherManager>1</otherManager>
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				<Shared>1464015</Shared>
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			<nameOfIssuer>New Relic Inc</nameOfIssuer>
			<titleOfClass>COM</titleOfClass>
			<cusip>64829B100</cusip>
			<value>10021</value>
			<shrsOrPrnAmt>
				<sshPrnamt>91132</sshPrnamt>
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			<investmentDiscretion>DFND</investmentDiscretion>
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				<Shared>91132</Shared>
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		<infoTable>
			<nameOfIssuer>Nextdoor Holdings Inc</nameOfIssuer>
			<titleOfClass>COM CL A</titleOfClass>
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			<value>768</value>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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			<titleOfClass>COM</titleOfClass>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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		<infoTable>
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</informationTable>
