SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  SCHEDULE 13G

                                 (RULE 13d-102)

   Information to be Included in Statements Filed Pursuant to ss.240.13d-1(b),
        (c) and (d) and Amendments Thereto Filed Pursuant to ss.240.13d-2

                    Under the Securities Exchange Act of 1934

                               (Amendment No. 2)*


                             Mission West Properties
                         ------------------------------

                                (Name of Issuer)

                                  Common Stock
                         ------------------------------

                         (Title of Class of Securities)

                                    605203108
                         ------------------------------
                                 (CUSIP Number)

                                December 31, 2008
             -------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

            Check the appropriate box to designate the rule pursuant
                        to which this Schedule is filed:

                                (x) Rule 13d-1(b)
                                ( ) Rule 13d-1(c)
                                ( ) Rule 13d-1(d)

----------------
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
                        (Continued on following page(s))





1.      NAME OF REPORTING PERSONS

        Teachers Advisors, Inc.

2.      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     (a) ( )
                                                             (b) ( )

3.      SEC USE ONLY


4.      CITIZENSHIP OR PLACE OF ORGANIZATION

        Delaware

NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:

        5.    SOLE VOTING POWER                   686,200

        6.    SHARED VOTING POWER                 0

        7.    SOLE DISPOSITIVE POWER              686,200

        8.    SHARED DISPOSITIVE POWER            0

9.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                    686,200

10.     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES ( )


11.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                                     3.47%

12.     TYPE OF REPORTING PERSON

                                       IA








1.       NAME OF REPORTING PERSONS

         TIAA-CREF Investment Management, LLC

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     (a) ( )
                                                              (b) ( )

3.       SEC USE ONLY


4.       CITIZENSHIP OR PLACE OF ORGANIZATION

         Delaware

NUMBER OF SHARES BENEFICIALLY OWNED
BY EACH REPORTING PERSON WITH:

         5.    SOLE VOTING POWER                   355,608

         6.    SHARED VOTING POWER                 0

         7.    SOLE DISPOSITIVE POWER              355,608

         8.    SHARED DISPOSITIVE POWER            0

9.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                     355,608

10.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
         SHARES ( )


11.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                                      1.80%

12.      TYPE OF REPORTING PERSON

                                       IA







ITEM 1(a).        NAME OF ISSUER:

                           Mission West Properties

ITEM 1(b).        ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

                           10050 Bandley Drive
                           Cupertino, CA 95014

ITEMS 2(a)-2(c).  NAME, ADDRESS OF PRINCIPAL BUSINESS OFFICE, AND CITIZENSHIP OF
                  PERSONS FILING:

                           Teachers Advisors, Inc. ("Advisors")
                           730 Third Avenue
                           New York, NY  10017-3206
                           Citizenship: Delaware

                           TIAA-CREF Investment Management, LLC ("Investment
                            Management")
                           730 Third Avenue
                           New York, NY  10017-3206
                           Citizenship: Delaware



ITEM 2(d).        TITLE OF CLASS OF SECURITIES:

                           Common Stock

ITEM 2(e).        CUSIP NUMBER:

                           605203108

ITEM 3.           IF THIS STATEMENT IS FILED PURSUANT TO ss.240.13d-1(b), OR
                  ss.240.13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:


ADVISORS

(a)      ( )      Broker or dealer registered under Section 15 of the Exchange
                  Act.

(b)      ( )      Bank as defined in Section 3(a)(6) of the Exchange Act.

(c)      ( )      Insurance Company as defined in Section 3(a)(19) of the
                  Exchange Act.

(d)      ( )      Investment Company registered under Section 8 of the
                  Investment Company Act.

(e)      (x)      An investment adviser in accordance with
                  Rule 13d-1(b)(1)(ii)(E).

(f)      ( )      An employee benefit plan or endowment fund in accordance with
                  Rule 13d-1(b)(1)(ii)(F).

(g)      ( )      A parent holding company or control person in accordance with
                  Rule 13d-1(b)(1)(ii)(G).

(h)      ( )      A savings association as defined in Section 3(b) of the
                  Federal Deposit Insurance Act.

(i)      ( )      A church plan that is excluded from the definition of an
                  investment company under Section 3(c)(14) of the Investment
                  Company Act.

(j)      ( )      Group, in accordance with Rule 13d-1(b)(1)(ii)(J).





INVESTMENT MANAGEMENT

(a)      ( )      Broker or dealer registered under Section 15 of the Exchange
                  Act.

(b)      ( )      Bank as defined in Section 3(a)(6) of the Exchange Act.

(c)      ( )      Insurance Company as defined in Section 3(a)(19) of the
                  Exchange Act.

(d)      ( )      Investment Company registered under Section 8 of the
                  Investment Company Act.

(e)      (x)      An investment adviser in accordance with
                  Rule 13d-1(b)(1)(ii)(E).

(f)      ( )      An employee benefit plan or endowment fund in accordance with
                  Rule 13d-1(b)(1)(ii)(F).

(g)      ( )      A parent holding company or control person in accordance with
                  Rule 13d-1(b)(1)(ii)(G).

(h)      ( )      A savings association as defined in Section 3(b) of the
                  Federal Deposit Insurance Act.

(i)      ( )      A church plan that is excluded from the definition of an
                  investment company under Section 3(c)(14) of the Investment
                  Company Act.

(j)      ( )      Group, in accordance with Rule 13d-1(b)(1)(ii)(J).


If this statement is filed pursuant to Rule 13d-1(c), check this box. ( )

ITEM 4.           OWNERSHIP

         Provide the following information regarding the aggregate number and
percentage of the class of securities of the issuer identified in Item 1:

                  (a) Aggregate amount beneficially owned: 1,041,808 (See
                      Exhibit A)

                  (b) Percent of class: 5.27%

                  (c) Number of shares as to which the person has:

                                    Investment Management            Advisors
                                    ---------------------            --------

Sole Voting Power:                  355,608                          686,200

Shared Voting Power:                0                                0

Sole Dispositive Power:             355,608                          686,200

Shared Dispositive Power:           0                                0

ITEM 5.           OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

                  If this statement is being filed to report the fact that as of
                  the date hereof the reporting person has ceased to be the
                  beneficial owner of more than 5 percent of the class of
                  securities, check the following ( ).

ITEM 6.           OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER
                  PERSON.

                  See Exhibit A






ITEM  7.          IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH
                  ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING
                  COMPANY.

                  Not Applicable

ITEM 8.           IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

                  Not Applicable

ITEM 9.           NOTICE OF DISSOLUTION OF GROUP.

                  Not Applicable


ITEM 10.          CERTIFICATIONS.

                  By signing below I certify that, to the best of my knowledge
                  and belief, the securities referred to above were acquired and
                  are held in the ordinary course of business and were not
                  acquired and are not held for the purpose of or with the
                  effect of changing or influencing the control of the issuer of
                  the securities and were not acquired and are not held in
                  connection with or as a participant in any transaction having
                  that purpose or effect.

                  SIGNATURE.

                  After reasonable inquiry and to the best of my knowledge and
                  belief, I certify that the information set forth in this
                  statement is true, complete and correct.

                  Date: February 13, 2009

                                          TIAA-CREF INVESTMENT MANAGEMENT, LLC

                                          By: /s/ Michael Albert
                                              ------------------
                                          Michael Albert
                                          Managing Director, Control Services


                                          TEACHERS ADVISORS, INC.

                                          By: /s/ Michael Albert
                                              ------------------
                                          Michael Albert
                                          Managing Director, Control Services







                                    EXHIBIT A

ITEM 6.  OWNERSHIP.

TIAA-CREF Investment Management, LLC ("Investment Management") acts as the
investment adviser to the College Retirement Equities Fund ("CREF"), a
registered investment company, and may be deemed to be a beneficial owner of
355,608 shares of Issuer's common stock owned by CREF. Teachers Advisors, Inc.
("Advisors") is the investment adviser to three registered investment companies,
TIAA-CREF Funds ("Mutual Funds"), TIAA-CREF Life Funds ("Life Funds"), and TIAA
Separate Account VA-1 ("VA-1"), as well as the TIAA-CREF Asset Management
Commingled Funds Trust I ("TCAM Funds"), and may be deemed to be a beneficial
owner of 686,200 shares of Issuer's common stock owned by the Mutual Funds, Life
Funds and VA-1. Investment Management and Advisors are reporting their combined
holdings for the purpose of administrative convenience. These shares were
acquired in the ordinary course of business, and not with the purpose or effect
of changing or influencing control of the Issuer. Each of Investment Management
and Advisors expressly disclaims beneficial ownership of the other's securities
holdings and each disclaims that it is a member of a "group" with the other.